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Add ProcArrayGroupUpdate wait event.

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Discussion: http://postgr.es/m/CA+TgmobgWHcXDcChX2+BqJDk2dkPVF85ZrJFhUyHHQmw8diTpA@mail.gmail.com
This commit is contained in:
Robert Haas
2017-04-07 13:41:47 -04:00
parent dbb2a93147
commit d4116a7719
4 changed files with 11 additions and 1 deletions
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3
src/backend/postmaster/pgstat.c
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@@ -3560,6 +3560,9 @@ pgstat_get_wait_ipc(WaitEventIPC w)
case WAIT_EVENT_PARALLEL_BITMAP_SCAN:
event_name = "ParallelBitmapScan";
break;
case WAIT_EVENT_PROCARRAY_GROUP_UPDATE:
event_name = "ProcArrayGroupUpdate";
break;
case WAIT_EVENT_SAFE_SNAPSHOT:
event_name = "SafeSnapshot";
break;

3
src/backend/storage/ipc/procarray.c
View File

@@ -53,6 +53,7 @@
#include "access/xlog.h"
#include "catalog/catalog.h"
#include "miscadmin.h"
#include "pgstat.h"
#include "storage/proc.h"
#include "storage/procarray.h"
#include "storage/spin.h"
@@ -513,6 +514,7 @@ ProcArrayGroupClearXid(PGPROC *proc, TransactionId latestXid)
int extraWaits = 0;
/* Sleep until the leader clears our XID. */
pgstat_report_wait_start(WAIT_EVENT_PROCARRAY_GROUP_UPDATE);
for (;;)
{
/* acts as a read barrier */
@@ -521,6 +523,7 @@ ProcArrayGroupClearXid(PGPROC *proc, TransactionId latestXid)
break;
extraWaits++;
}
pgstat_report_wait_end();
Assert(pg_atomic_read_u32(&proc->procArrayGroupNext) == INVALID_PGPROCNO);