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The new files for statistical system views.
Jan
This commit is contained in:
Jan Wieck
parent
8d80b0d980
commit
140ddb78fe
2809
src/backend/postmaster/pgstat.c
Normal file
2809
src/backend/postmaster/pgstat.c
Normal file
File diff suppressed because it is too large
Load Diff
376
src/backend/utils/adt/pgstatfuncs.c
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376
src/backend/utils/adt/pgstatfuncs.c
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@ -0,0 +1,376 @@
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#include "postgres.h"
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#include "fmgr.h"
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#include "utils/hsearch.h"
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#include "access/xact.h"
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#include "catalog/pg_shadow.h"
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#include "nodes/execnodes.h"
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#include "pgstat.h"
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extern Datum pg_stat_get_numscans(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_tuples_returned(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_tuples_fetched(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_tuples_inserted(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_tuples_updated(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_tuples_deleted(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_blocks_fetched(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_blocks_hit(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_backend_idset(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_backend_pid(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_backend_dbid(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_backend_userid(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_backend_activity(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_db_numbackends(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_db_xact_commit(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_db_xact_rollback(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_db_blocks_fetched(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_db_blocks_hit(PG_FUNCTION_ARGS);
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Datum
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pg_stat_get_numscans(PG_FUNCTION_ARGS)
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{
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PgStat_StatTabEntry *tabentry;
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Oid relid;
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int64 result;
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relid = PG_GETARG_OID(0);
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64)(tabentry->numscans);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_tuples_returned(PG_FUNCTION_ARGS)
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{
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PgStat_StatTabEntry *tabentry;
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Oid relid;
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int64 result;
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relid = PG_GETARG_OID(0);
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64)(tabentry->tuples_returned);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_tuples_fetched(PG_FUNCTION_ARGS)
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{
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PgStat_StatTabEntry *tabentry;
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Oid relid;
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int64 result;
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relid = PG_GETARG_OID(0);
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64)(tabentry->tuples_fetched);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_tuples_inserted(PG_FUNCTION_ARGS)
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{
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PgStat_StatTabEntry *tabentry;
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Oid relid;
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int64 result;
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relid = PG_GETARG_OID(0);
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64)(tabentry->tuples_inserted);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_tuples_updated(PG_FUNCTION_ARGS)
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{
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PgStat_StatTabEntry *tabentry;
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Oid relid;
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int64 result;
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relid = PG_GETARG_OID(0);
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64)(tabentry->tuples_updated);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_tuples_deleted(PG_FUNCTION_ARGS)
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{
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PgStat_StatTabEntry *tabentry;
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Oid relid;
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int64 result;
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relid = PG_GETARG_OID(0);
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64)(tabentry->tuples_deleted);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_blocks_fetched(PG_FUNCTION_ARGS)
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{
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PgStat_StatTabEntry *tabentry;
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Oid relid;
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int64 result;
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relid = PG_GETARG_OID(0);
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64)(tabentry->blocks_fetched);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_blocks_hit(PG_FUNCTION_ARGS)
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{
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PgStat_StatTabEntry *tabentry;
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Oid relid;
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int64 result;
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relid = PG_GETARG_OID(0);
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64)(tabentry->blocks_hit);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_backend_idset(PG_FUNCTION_ARGS)
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{
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FmgrInfo *fmgr_info = fcinfo->flinfo;
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MemoryContext oldcxt;
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int32 result;
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if (fcinfo->resultinfo == NULL)
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elog(ERROR, "called in context that does not accept a set result (1)");
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if (!IsA(fcinfo->resultinfo, ReturnSetInfo))
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elog(ERROR, "called in context that does not accept a set result (2)");
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if (fmgr_info->fn_extra == NULL)
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{
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if (fmgr_info->fn_mcxt == NULL)
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elog(ERROR, "No function memory context in set-function");
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oldcxt = MemoryContextSwitchTo(fmgr_info->fn_mcxt);
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fmgr_info->fn_extra = palloc(sizeof(int32) * 2);
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((int32 *)(fmgr_info->fn_extra))[0] = 0;
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((int32 *)(fmgr_info->fn_extra))[1] =
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(int32)pgstat_fetch_stat_numbackends();
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MemoryContextSwitchTo(oldcxt);
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}
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((int32 *)(fmgr_info->fn_extra))[0] += 1;
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result = ((int32 *)(fmgr_info->fn_extra))[0];
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if (result > ((int32 *)(fmgr_info->fn_extra))[1])
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{
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((ReturnSetInfo *)(fcinfo->resultinfo))->isDone = ExprEndResult;
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PG_RETURN_NULL();
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}
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((ReturnSetInfo *)(fcinfo->resultinfo))->isDone = ExprMultipleResult;
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PG_RETURN_INT32(result);
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}
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Datum
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pg_stat_get_backend_pid(PG_FUNCTION_ARGS)
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{
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PgStat_StatBeEntry *beentry;
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int32 beid;
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beid = PG_GETARG_INT32(0);
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if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
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PG_RETURN_NULL();
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PG_RETURN_INT32(beentry->procpid);
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}
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Datum
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pg_stat_get_backend_dbid(PG_FUNCTION_ARGS)
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{
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PgStat_StatBeEntry *beentry;
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int32 beid;
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beid = PG_GETARG_INT32(0);
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if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
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PG_RETURN_NULL();
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PG_RETURN_OID(beentry->databaseid);
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}
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Datum
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pg_stat_get_backend_userid(PG_FUNCTION_ARGS)
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{
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PgStat_StatBeEntry *beentry;
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int32 beid;
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beid = PG_GETARG_INT32(0);
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if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
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PG_RETURN_NULL();
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PG_RETURN_OID(beentry->userid);
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}
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Datum
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pg_stat_get_backend_activity(PG_FUNCTION_ARGS)
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{
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PgStat_StatBeEntry *beentry;
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int32 beid;
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int len;
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text *result;
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if (!superuser())
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PG_RETURN_NULL();
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beid = PG_GETARG_INT32(0);
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if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
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PG_RETURN_NULL();
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len = strlen(beentry->activity);
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result = palloc(VARHDRSZ + len);
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VARATT_SIZEP(result) = VARHDRSZ + len;
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memcpy(VARDATA(result), beentry->activity, len);
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PG_RETURN_TEXT_P(result);
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}
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Datum
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pg_stat_get_db_numbackends(PG_FUNCTION_ARGS)
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{
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PgStat_StatDBEntry *dbentry;
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Oid dbid;
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int32 result;
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dbid = PG_GETARG_OID(0);
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if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
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result = 0;
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else
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result = (int32)(dbentry->n_backends);
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PG_RETURN_INT32(result);
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}
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Datum
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pg_stat_get_db_xact_commit(PG_FUNCTION_ARGS)
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{
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PgStat_StatDBEntry *dbentry;
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Oid dbid;
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int64 result;
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dbid = PG_GETARG_OID(0);
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if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
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result = 0;
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else
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result = (int64)(dbentry->n_xact_commit);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_db_xact_rollback(PG_FUNCTION_ARGS)
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{
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PgStat_StatDBEntry *dbentry;
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Oid dbid;
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int64 result;
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dbid = PG_GETARG_OID(0);
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if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
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result = 0;
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else
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result = (int64)(dbentry->n_xact_rollback);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_db_blocks_fetched(PG_FUNCTION_ARGS)
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{
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PgStat_StatDBEntry *dbentry;
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Oid dbid;
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int64 result;
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dbid = PG_GETARG_OID(0);
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if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
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result = 0;
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else
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result = (int64)(dbentry->n_blocks_fetched);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_db_blocks_hit(PG_FUNCTION_ARGS)
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{
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PgStat_StatDBEntry *dbentry;
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Oid dbid;
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int64 result;
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dbid = PG_GETARG_OID(0);
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if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
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result = 0;
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else
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result = (int64)(dbentry->n_blocks_hit);
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PG_RETURN_INT64(result);
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}
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380
src/include/pgstat.h
Normal file
380
src/include/pgstat.h
Normal file
@ -0,0 +1,380 @@
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/* ----------
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* pgstat.h
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*
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* Definitions for the PostgreSQL statistics collector daemon.
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*
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* Copyright (c) 2001, PostgreSQL Global Development Group
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*
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* $Id: pgstat.h,v 1.1 2001/06/22 19:18:36 wieck Exp $
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* ----------
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*/
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#ifndef PGSTAT_H
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#define PGSTAT_H
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/* ----------
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* Paths for the statistics files. The %s is replaced with the
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* installations $PGDATA.
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* ----------
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*/
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#define PGSTAT_STAT_FILENAME "%s/pgstat.stat"
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#define PGSTAT_STAT_TMPFILE "%s/pgstat.tmp.%d"
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/* ----------
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* Timer definitions.
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* ----------
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*/
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#define PGSTAT_STAT_INTERVAL 500 /* How often to write the status */
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/* file in milliseconds. */
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#define PGSTAT_DESTROY_DELAY 10000 /* How long to keep destroyed */
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/* objects known to give delayed */
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/* UDP packets time to arrive */
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/* in milliseconds. */
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#define PGSTAT_DESTROY_COUNT (PGSTAT_DESTROY_DELAY \
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/ PGSTAT_STAT_INTERVAL)
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/* ----------
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* How much of the actual query to send to the collector.
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* ----------
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*/
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#define PGSTAT_ACTIVITY_SIZE 256
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/* ----------
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* The types of backend/postmaster -> collector messages
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* ----------
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*/
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#define PGSTAT_MTYPE_DUMMY 0
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#define PGSTAT_MTYPE_BESTART 1
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#define PGSTAT_MTYPE_BETERM 2
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#define PGSTAT_MTYPE_ACTIVITY 3
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#define PGSTAT_MTYPE_TABSTAT 4
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#define PGSTAT_MTYPE_TABPURGE 5
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#define PGSTAT_MTYPE_DROPDB 6
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#define PGSTAT_MTYPE_RESETCOUNTER 7
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/* ----------
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* TODO
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* For simplicity now, the number of messages buffered in
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* pgstat_recvbuffer(). Should be an amount of bytes used
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* for a gapless wraparound buffer.
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* ----------
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*/
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#define PGSTAT_RECVBUFFERSZ 1024
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/* ----------
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* The initial size hints for the hash tables used in the
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* collector.
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* ----------
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*/
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#define PGSTAT_DB_HASH_SIZE 16
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#define PGSTAT_BE_HASH_SIZE 512
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#define PGSTAT_TAB_HASH_SIZE 512
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/* ----------
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* The data type used for counters.
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* ----------
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*/
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typedef int64 PgStat_Counter;
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/* ------------------------------------------------------------
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* Statistic collector data structures follow
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* ------------------------------------------------------------
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*/
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/* ----------
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* PgStat_StatDBEntry The collectors data per database
|
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* ----------
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*/
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typedef struct PgStat_StatDBEntry
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{
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Oid databaseid;
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HTAB *tables;
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int n_backends;
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PgStat_Counter n_connects;
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PgStat_Counter n_xact_commit;
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PgStat_Counter n_xact_rollback;
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PgStat_Counter n_blocks_fetched;
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PgStat_Counter n_blocks_hit;
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int destroy;
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} PgStat_StatDBEntry;
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|
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/* ----------
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* PgStat_StatBeEntry The collectors data per backend
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* ----------
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*/
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||||
typedef struct PgStat_StatBeEntry
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{
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Oid databaseid;
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Oid userid;
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int procpid;
|
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char activity[PGSTAT_ACTIVITY_SIZE];
|
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} PgStat_StatBeEntry;
|
||||
|
||||
|
||||
/* ----------
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* PgStat_StatBeDead Because UDP packets can arrive out of
|
||||
* order, we need to keep some information
|
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* about backends that are known to be
|
||||
* dead for some seconds. This info is held
|
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* in a hash table of these structs.
|
||||
* ----------
|
||||
*/
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||||
typedef struct PgStat_StatBeDead
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||||
{
|
||||
int procpid;
|
||||
int backendid;
|
||||
int destroy;
|
||||
} PgStat_StatBeDead;
|
||||
|
||||
|
||||
/* ----------
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||||
* PgStat_StatTabEntry The collectors data table data
|
||||
* ----------
|
||||
*/
|
||||
typedef struct PgStat_StatTabEntry
|
||||
{
|
||||
Oid tableid;
|
||||
|
||||
PgStat_Counter numscans;
|
||||
|
||||
PgStat_Counter tuples_returned;
|
||||
PgStat_Counter tuples_fetched;
|
||||
PgStat_Counter tuples_inserted;
|
||||
PgStat_Counter tuples_updated;
|
||||
PgStat_Counter tuples_deleted;
|
||||
|
||||
PgStat_Counter blocks_fetched;
|
||||
PgStat_Counter blocks_hit;
|
||||
|
||||
int destroy;
|
||||
} PgStat_StatTabEntry;
|
||||
|
||||
|
||||
/* ------------------------------------------------------------
|
||||
* Message formats follow
|
||||
* ------------------------------------------------------------
|
||||
*/
|
||||
|
||||
|
||||
/* ----------
|
||||
* PgStat_MsgHdr The common message header
|
||||
* ----------
|
||||
*/
|
||||
typedef struct PgStat_MsgHdr
|
||||
{
|
||||
int m_type;
|
||||
int m_size;
|
||||
int m_backendid;
|
||||
int m_procpid;
|
||||
Oid m_databaseid;
|
||||
Oid m_userid;
|
||||
} PgStat_MsgHdr;
|
||||
|
||||
/* ----------
|
||||
* PgStat_TabEntry A table slot in a MsgTabstat
|
||||
* ----------
|
||||
*/
|
||||
typedef struct PgStat_TableEntry
|
||||
{
|
||||
Oid t_id;
|
||||
|
||||
PgStat_Counter t_numscans;
|
||||
|
||||
PgStat_Counter t_tuples_returned;
|
||||
PgStat_Counter t_tuples_fetched;
|
||||
PgStat_Counter t_tuples_inserted;
|
||||
PgStat_Counter t_tuples_updated;
|
||||
PgStat_Counter t_tuples_deleted;
|
||||
|
||||
PgStat_Counter t_blocks_fetched;
|
||||
PgStat_Counter t_blocks_hit;
|
||||
} PgStat_TableEntry;
|
||||
|
||||
|
||||
/* ----------
|
||||
* PgStat_MsgDummy A dummy message, ignored by the collector
|
||||
* ----------
|
||||
*/
|
||||
typedef struct PgStat_MsgDummy
|
||||
{
|
||||
PgStat_MsgHdr m_hdr;
|
||||
char m_dummy[512];
|
||||
} PgStat_MsgDummy;
|
||||
|
||||
/* ----------
|
||||
* PgStat_MsgBestart Sent by the backend on startup
|
||||
* ----------
|
||||
*/
|
||||
typedef struct PgStat_MsgBestart
|
||||
{
|
||||
PgStat_MsgHdr m_hdr;
|
||||
} PgStat_MsgBestart;
|
||||
|
||||
/* ----------
|
||||
* PgStat_MsgBeterm Sent by the postmaster after backend exit
|
||||
* ----------
|
||||
*/
|
||||
typedef struct PgStat_MsgBeterm
|
||||
{
|
||||
PgStat_MsgHdr m_hdr;
|
||||
} PgStat_MsgBeterm;
|
||||
|
||||
/* ----------
|
||||
* PgStat_MsgActivity Sent by the backends when they start
|
||||
* to parse a query.
|
||||
* ----------
|
||||
*/
|
||||
typedef struct PgStat_MsgActivity
|
||||
{
|
||||
PgStat_MsgHdr m_hdr;
|
||||
char m_what[PGSTAT_ACTIVITY_SIZE];
|
||||
} PgStat_MsgActivity;
|
||||
|
||||
/* ----------
|
||||
* How many table entries fit into a MsgTabstat. Actually,
|
||||
* this will keep the UDP packets below 1K, what should fit
|
||||
* unfragmented into the MTU of the lo interface on most
|
||||
* platforms. Does anybody care for platforms where it doesn't?
|
||||
* ----------
|
||||
*/
|
||||
#define PGSTAT_NUM_TABENTRIES ((1000 - sizeof(PgStat_MsgHdr)) \
|
||||
/ sizeof(PgStat_TableEntry))
|
||||
|
||||
/* ----------
|
||||
* PgStat_MsgTabstat Sent by the backend to report table
|
||||
* and buffer access statistics.
|
||||
* ----------
|
||||
*/
|
||||
typedef struct PgStat_MsgTabstat
|
||||
{
|
||||
PgStat_MsgHdr m_hdr;
|
||||
int m_nentries;
|
||||
int m_xact_commit;
|
||||
int m_xact_rollback;
|
||||
PgStat_TableEntry m_entry[PGSTAT_NUM_TABENTRIES];
|
||||
} PgStat_MsgTabstat;
|
||||
|
||||
|
||||
/* ----------
|
||||
* How many Oid entries fit into a MsgTabpurge.
|
||||
* ----------
|
||||
*/
|
||||
#define PGSTAT_NUM_TABPURGE ((1000 - sizeof(PgStat_MsgHdr)) \
|
||||
/ sizeof(PgStat_TableEntry))
|
||||
|
||||
/* ----------
|
||||
* PgStat_MsgTabpurge Sent by the backend to tell the collector
|
||||
* about dead tables.
|
||||
* ----------
|
||||
*/
|
||||
typedef struct PgStat_MsgTabpurge
|
||||
{
|
||||
PgStat_MsgHdr m_hdr;
|
||||
int m_nentries;
|
||||
Oid m_tableid[PGSTAT_NUM_TABPURGE];
|
||||
} PgStat_MsgTabpurge;
|
||||
|
||||
|
||||
/* ----------
|
||||
* PgStat_MsgDropdb Sent by the backend to tell the collector
|
||||
* about dropped database
|
||||
* ----------
|
||||
*/
|
||||
typedef struct PgStat_MsgDropdb
|
||||
{
|
||||
PgStat_MsgHdr m_hdr;
|
||||
Oid m_databaseid;
|
||||
} PgStat_MsgDropdb;
|
||||
|
||||
|
||||
/* ----------
|
||||
* PgStat_MsgResetcounter Sent by the backend to tell the collector
|
||||
* to reset counters
|
||||
* ----------
|
||||
*/
|
||||
typedef struct PgStat_MsgResetcounter
|
||||
{
|
||||
PgStat_MsgHdr m_hdr;
|
||||
} PgStat_MsgResetcounter;
|
||||
|
||||
|
||||
/* ----------
|
||||
* PgStat_Msg Union over all possible messages.
|
||||
* ----------
|
||||
*/
|
||||
typedef union PgStat_Msg
|
||||
{
|
||||
PgStat_MsgHdr msg_hdr;
|
||||
PgStat_MsgDummy msg_dummy;
|
||||
PgStat_MsgBestart msg_bestart;
|
||||
PgStat_MsgActivity msg_activity;
|
||||
PgStat_MsgTabstat msg_tabstat;
|
||||
PgStat_MsgTabpurge msg_tabpurge;
|
||||
PgStat_MsgDropdb msg_dropdb;
|
||||
PgStat_MsgResetcounter msg_resetcounter;
|
||||
} PgStat_Msg;
|
||||
|
||||
|
||||
|
||||
|
||||
/* ----------
|
||||
* Functions called from postmaster
|
||||
* ----------
|
||||
*/
|
||||
extern int pgstat_init(void);
|
||||
extern int pgstat_start(void);
|
||||
extern int pgstat_ispgstat(int pid);
|
||||
extern void pgstat_beterm(int pid);
|
||||
|
||||
/* ----------
|
||||
* Functions called from backends
|
||||
* ----------
|
||||
*/
|
||||
extern void pgstat_bestart(void);
|
||||
|
||||
extern void pgstat_ping(void);
|
||||
extern void pgstat_report_activity(char *what);
|
||||
extern void pgstat_report_tabstat(void);
|
||||
extern int pgstat_vacuum_tabstat(void);
|
||||
|
||||
extern void pgstat_reset_counters(void);
|
||||
|
||||
extern void pgstat_initstats(PgStat_Info *stats, Relation rel);
|
||||
|
||||
extern void pgstat_reset_heap_scan(PgStat_Info *stats);
|
||||
extern void pgstat_count_heap_scan(PgStat_Info *stats);
|
||||
extern void pgstat_count_heap_getnext(PgStat_Info *stats);
|
||||
extern void pgstat_count_heap_fetch(PgStat_Info *stats);
|
||||
extern void pgstat_count_heap_insert(PgStat_Info *stats);
|
||||
extern void pgstat_count_heap_update(PgStat_Info *stats);
|
||||
extern void pgstat_count_heap_delete(PgStat_Info *stats);
|
||||
|
||||
extern void pgstat_reset_index_scan(PgStat_Info *stats);
|
||||
extern void pgstat_count_index_scan(PgStat_Info *stats);
|
||||
extern void pgstat_count_index_getnext(PgStat_Info *stats);
|
||||
|
||||
extern void pgstat_count_buffer_read(PgStat_Info *stats,
|
||||
Relation rel);
|
||||
extern void pgstat_count_buffer_hit(PgStat_Info *stats,
|
||||
Relation rel);
|
||||
extern void pgstat_count_xact_commit(void);
|
||||
extern void pgstat_count_xact_rollback(void);
|
||||
|
||||
/* ----------
|
||||
* Support functions for the SQL-callable functions to
|
||||
* generate the pgstat* views.
|
||||
* ----------
|
||||
*/
|
||||
extern PgStat_StatDBEntry *pgstat_fetch_stat_dbentry(Oid dbid);
|
||||
extern PgStat_StatTabEntry *pgstat_fetch_stat_tabentry(Oid relid);
|
||||
extern PgStat_StatBeEntry *pgstat_fetch_stat_beentry(int beid);
|
||||
extern int pgstat_fetch_stat_numbackends(void);
|
||||
|
||||
|
||||
#endif /* PGSTAT_H */
|
||||
Loading…
x
Reference in New Issue
Block a user