diff options
| author | Robert Haas <rhaas@postgresql.org> | 2017-03-08 12:05:43 -0500 |
|---|---|---|
| committer | Robert Haas <rhaas@postgresql.org> | 2017-03-08 12:05:43 -0500 |
| commit | f35742ccb7aa53ee3ed8416bbb378b0c3eeb6bb9 (patch) | |
| tree | 66c88951dd3b1546159869072e8ff3e3b506568b /doc | |
| parent | 4eafdcc27608dfb8a3afa3155d6ae07f66179782 (diff) | |
Support parallel bitmap heap scans.
The index is scanned by a single process, but then all cooperating
processes can iterate jointly over the resulting set of heap blocks.
In the future, we might also want to support using a parallel bitmap
index scan to set up for a parallel bitmap heap scan, but that's a
job for another day.
Dilip Kumar, with some corrections and cosmetic changes by me. The
larger patch set of which this is a part has been reviewed and tested
by (at least) Andres Freund, Amit Khandekar, Tushar Ahuja, Rafia
Sabih, Haribabu Kommi, Thomas Munro, and me.
Discussion: http://postgr.es/m/CAFiTN-uc4=0WxRGfCzs-xfkMYcSEWUC-Fon6thkJGjkh9i=13A@mail.gmail.com
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/src/sgml/monitoring.sgml | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/doc/src/sgml/monitoring.sgml b/doc/src/sgml/monitoring.sgml index 27ed35f0a7b..4d03531cc15 100644 --- a/doc/src/sgml/monitoring.sgml +++ b/doc/src/sgml/monitoring.sgml @@ -1211,7 +1211,7 @@ 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="10"><literal>IPC</></entry> + <entry morerows="11"><literal>IPC</></entry> <entry><literal>BgWorkerShutdown</></entry> <entry>Waiting for background worker to shut down.</entry> </row> @@ -1248,6 +1248,10 @@ postgres 27093 0.0 0.0 30096 2752 ? Ss 11:34 0:00 postgres: ser <entry>Waiting for parallel workers to finish computing.</entry> </row> <row> + <entry><literal>ParallelBitmapPopulate</></entry> + <entry>Waiting for the leader to populate the TidBitmap.</entry> + </row> + <row> <entry><literal>SafeSnapshot</></entry> <entry>Waiting for a snapshot for a <literal>READ ONLY DEFERRABLE</> transaction.</entry> </row> |