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| author | Robert Haas <rhaas@postgresql.org> | 2014-10-02 13:58:50 -0400 |
|---|---|---|
| committer | Robert Haas <rhaas@postgresql.org> | 2014-10-02 13:58:50 -0400 |
| commit | 3acc10c997f916f6a741d0b4876126b7b08e3892 (patch) | |
| tree | aa4a30df253f7c219c52b3d41327301ad21d8285 /src/include | |
| parent | 952872698d9443fdf9b808a1376017f00c91065a (diff) | |
| download | postgresql-3acc10c997f916f6a741d0b4876126b7b08e3892.tar.gz postgresql-3acc10c997f916f6a741d0b4876126b7b08e3892.zip | |
Increase the number of buffer mapping partitions to 128.
Testing by Amit Kapila, Andres Freund, and myself, with and without
other patches that also aim to improve scalability, seems to indicate
that this change is a significant win over the current value and over
smaller values such as 64. It's not clear how high we can push this
value before it starts to have negative side-effects elsewhere, but
going this far looks OK.
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/storage/lwlock.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/include/storage/lwlock.h b/src/include/storage/lwlock.h index 90ae7d443d7..02c8f1aa8c6 100644 --- a/src/include/storage/lwlock.h +++ b/src/include/storage/lwlock.h @@ -136,7 +136,7 @@ extern PGDLLIMPORT LWLockPadded *MainLWLockArray; */ /* Number of partitions of the shared buffer mapping hashtable */ -#define NUM_BUFFER_PARTITIONS 16 +#define NUM_BUFFER_PARTITIONS 128 /* Number of partitions the shared lock tables are divided into */ #define LOG2_NUM_LOCK_PARTITIONS 4 |