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| author | Thomas Munro <tmunro@postgresql.org> | 2019-03-14 10:25:27 +1300 |
|---|---|---|
| committer | Thomas Munro <tmunro@postgresql.org> | 2019-03-14 10:59:33 +1300 |
| commit | c6c9474aafa4de357ae424cd18b69e8bf7a4babe (patch) | |
| tree | 99d567cf37361f559828c2240fc93989a2124f76 /doc/src | |
| parent | 5655565c077c53b6e9b4b9bfcdf96439cf3af065 (diff) | |
| download | postgresql-c6c9474aafa4de357ae424cd18b69e8bf7a4babe.tar.gz postgresql-c6c9474aafa4de357ae424cd18b69e8bf7a4babe.zip | |
Use condition variables to wait for checkpoints.
Previously we used a polling/sleeping loop to wait for checkpoints
to begin and end, which leads to up to a couple hundred milliseconds
of needless thumb-twiddling. Use condition variables instead.
Author: Thomas Munro
Reviewed-by: Andres Freund
Discussion: https://postgr.es/m/CA%2BhUKGLY7sDe%2Bbg1K%3DbnEzOofGoo4bJHYh9%2BcDCXJepb6DQmLw%40mail.gmail.com
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/monitoring.sgml | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/doc/src/sgml/monitoring.sgml b/doc/src/sgml/monitoring.sgml index e2630fd3682..60b89356f70 100644 --- a/doc/src/sgml/monitoring.sgml +++ b/doc/src/sgml/monitoring.sgml @@ -1281,7 +1281,7 @@ postgres 27093 0.0 0.0 30096 2752 ? Ss 11:34 0:00 postgres: ser <entry>Waiting in an extension.</entry> </row> <row> - <entry morerows="34"><literal>IPC</literal></entry> + <entry morerows="36"><literal>IPC</literal></entry> <entry><literal>BgWorkerShutdown</literal></entry> <entry>Waiting for background worker to shut down.</entry> </row> @@ -1294,6 +1294,14 @@ postgres 27093 0.0 0.0 30096 2752 ? Ss 11:34 0:00 postgres: ser <entry>Waiting for the page number needed to continue a parallel B-tree scan to become available.</entry> </row> <row> + <entry><literal>CheckpointDone</literal></entry> + <entry>Waiting for a checkpoint to complete.</entry> + </row> + <row> + <entry><literal>CheckpointStart</literal></entry> + <entry>Waiting for a checkpoint to start.</entry> + </row> + <row> <entry><literal>ClogGroupUpdate</literal></entry> <entry>Waiting for group leader to update transaction status at transaction end.</entry> </row> |