database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-06-26 12:21:12 +03:00
Code Activity

Add GUC and storage parameter to set the maximum size of GIN pending list.

Browse Source 
Previously the maximum size of GIN pending list was controlled only by
work_mem. But the reasonable value of work_mem and the reasonable size
of the list are basically not the same, so it was not appropriate to
control both of them by only one GUC, i.e., work_mem. This commit
separates new GUC, pending_list_cleanup_size, from work_mem to allow
users to control only the size of the list.

Also this commit adds pending_list_cleanup_size as new storage parameter
to allow users to specify the size of the list per index. This is useful,
for example, when users want to increase the size of the list only for
the GIN index which can be updated heavily, and decrease it otherwise.

Reviewed by Etsuro Fujita.
This commit is contained in:
Fujii Masao
2014-11-11 21:08:21 +09:00
parent ae667f778d
commit a1b395b6a2
16 changed files with 125 additions and 31 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
doc/src/sgml/gist.sgml
View File

@ -861,7 +861,7 @@ my_distance(PG_FUNCTION_ARGS)
<para>
By default, a GiST index build switches to the buffering method when the
index size reaches <xref linkend="guc-effective-cache-size">. It can
be manually turned on or off by the <literal>BUFFERING</literal> parameter
be manually turned on or off by the <literal>buffering</literal> parameter
to the CREATE INDEX command. The default behavior is good for most cases,
but turning buffering off might speed up the build somewhat if the input
data is ordered.