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Adjust pgstat message definitions so that the target message size is

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specified in just one place and adhered to exactly, rather than just more
or less.  A side effect is to increase PGSTAT_ACTIVITY_SIZE (maximum
reported query length) from 256 to nearly 1000.
This commit is contained in:
Tom Lane
2004-06-26 16:32:04 +00:00
parent b2ca707746
commit 0ceeb4cbbe
2 changed files with 139 additions and 149 deletions
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49
src/backend/postmaster/pgstat.c
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@@ -13,7 +13,7 @@
*
* Copyright (c) 2001-2003, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/backend/postmaster/pgstat.c,v 1.75 2004/06/14 18:08:18 tgl Exp $
* $PostgreSQL: pgsql/src/backend/postmaster/pgstat.c,v 1.76 2004/06/26 16:32:02 tgl Exp $
* ----------
*/
#include "postgres.h"
@@ -22,12 +22,10 @@
#include <fcntl.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <errno.h>
#include <signal.h>
#include <time.h>
@@ -55,6 +53,47 @@
#include "utils/syscache.h"
/* ----------
* Paths for the statistics files. The %s is replaced with the
* installation's $PGDATA.
* ----------
*/
#define PGSTAT_STAT_FILENAME "%s/global/pgstat.stat"
#define PGSTAT_STAT_TMPFILE "%s/global/pgstat.tmp.%d"
/* ----------
* Timer definitions.
* ----------
*/
#define PGSTAT_STAT_INTERVAL 500 /* How often to write the status
* file; in milliseconds. */
#define PGSTAT_DESTROY_DELAY 10000 /* How long to keep destroyed
* objects known, to give delayed
* UDP packets time to arrive;
* in milliseconds. */
#define PGSTAT_DESTROY_COUNT (PGSTAT_DESTROY_DELAY / PGSTAT_STAT_INTERVAL)
#define PGSTAT_RESTART_INTERVAL 60 /* How often to attempt to restart
* a failed statistics collector;
* in seconds. */
/* ----------
* Amount of space reserved in pgstat_recvbuffer().
* ----------
*/
#define PGSTAT_RECVBUFFERSZ ((int) (1024 * sizeof(PgStat_Msg)))
/* ----------
* The initial size hints for the hash tables used in the collector.
* ----------
*/
#define PGSTAT_DB_HASH_SIZE 16
#define PGSTAT_BE_HASH_SIZE 512
#define PGSTAT_TAB_HASH_SIZE 512
/* ----------
* GUC parameters
* ----------
@@ -2760,7 +2799,7 @@ pgstat_recv_activity(PgStat_MsgActivity *msg, int len)
/*
* Here we check explicitly for 0 return, since we don't want to
* mangle the activity of an active backend by a delayed packed from a
* mangle the activity of an active backend by a delayed packet from a
* dead one.
*/
if (pgstat_add_backend(&msg->m_hdr) != 0)
@@ -2768,7 +2807,7 @@ pgstat_recv_activity(PgStat_MsgActivity *msg, int len)
entry = &(pgStatBeTable[msg->m_hdr.m_backendid - 1]);
strncpy(entry->activity, msg->m_what, PGSTAT_ACTIVITY_SIZE);
StrNCpy(entry->activity, msg->m_what, PGSTAT_ACTIVITY_SIZE);
entry->activity_start_sec =
GetCurrentAbsoluteTimeUsec(&entry->activity_start_usec);