database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-11-03 09:13:20 +03:00
Code Activity

Fix inconsistency in pg_buffercache docs.

Browse Source 
Commit 6e654546fb avoids locking bufmgr partitions to make pg_buffercache
less disruptive on production systems but forgot to update the docs.

Reported-by: Sawada Masahiko
Author: Sawada Masahiko
Reviewed-by: Amit Kapila
Backpatch-through: 10
Discussion: https://postgr.es/m/CA+fd4k6sD8oeP1qJbFAor=rCpYckU9DsywHiYx3x5Hz5Z8Ua_w@mail.gmail.com
This commit is contained in:
Amit Kapila
2020-05-08 09:07:14 +05:30
parent 3a48740e89
commit b50712ba75
1 changed files with 5 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
doc/src/sgml/pgbuffercache.sgml
View File

@@ -135,12 +135,11 @@
</para> </para>
<para> <para>
When the <structname>pg_buffercache</> view is accessed, internal buffer Since buffer manager locks are not taken to copy the buffer state data that
manager locks are taken for long enough to copy all the buffer state the view will display, accessing <structname>pg_buffercache</structname> view
data that the view will display. has less impact on normal buffer activity but it doesn't provide a consistent
This ensures that the view produces a consistent set of results, while not set of results across all buffers. However, we ensure that the information of
blocking normal buffer activity longer than necessary. Nonetheless there each buffer is self-consistent.
could be some impact on database performance if this view is read often.
</para> </para>
</sect2> </sect2>