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| author | Robert Haas <rhaas@postgresql.org> | 2016-03-10 12:44:09 -0500 |
|---|---|---|
| committer | Robert Haas <rhaas@postgresql.org> | 2016-03-10 12:44:09 -0500 |
| commit | 53be0b1add7064ca5db3cd884302dfc3268d884e (patch) | |
| tree | 913271b90f5a41778fe5bdbe2ac200c785dd6778 /src/backend/storage/buffer/bufmgr.c | |
| parent | a3a8309d450f7c4d1b743e84ba54ef5f7877d7be (diff) | |
| download | postgresql-53be0b1add7064ca5db3cd884302dfc3268d884e.tar.gz postgresql-53be0b1add7064ca5db3cd884302dfc3268d884e.zip | |
Provide much better wait information in pg_stat_activity.
When a process is waiting for a heavyweight lock, we will now indicate
the type of heavyweight lock for which it is waiting. Also, you can
now see when a process is waiting for a lightweight lock - in which
case we will indicate the individual lock name or the tranche, as
appropriate - or for a buffer pin.
Amit Kapila, Ildus Kurbangaliev, reviewed by me. Lots of helpful
discussion and suggestions by many others, including Alexander
Korotkov, Vladimir Borodin, and many others.
Diffstat (limited to 'src/backend/storage/buffer/bufmgr.c')
| -rw-r--r-- | src/backend/storage/buffer/bufmgr.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/backend/storage/buffer/bufmgr.c b/src/backend/storage/buffer/bufmgr.c index 68cf5cc9f61..e8e0825eb0c 100644 --- a/src/backend/storage/buffer/bufmgr.c +++ b/src/backend/storage/buffer/bufmgr.c @@ -3351,6 +3351,9 @@ LockBufferForCleanup(Buffer buffer) UnlockBufHdr(bufHdr); LockBuffer(buffer, BUFFER_LOCK_UNLOCK); + /* Report the wait */ + pgstat_report_wait_start(WAIT_BUFFER_PIN, 0); + /* Wait to be signaled by UnpinBuffer() */ if (InHotStandby) { @@ -3364,6 +3367,8 @@ LockBufferForCleanup(Buffer buffer) else ProcWaitForSignal(); + pgstat_report_wait_end(); + /* * Remove flag marking us as waiter. Normally this will not be set * anymore, but ProcWaitForSignal() can return for other signals as |