database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-10-16 17:07:43 +03:00
Code Activity

Allow per-tablespace effective_io_concurrency

Browse Source 
Per discussion, nowadays it is possible to have tablespaces that have
wildly different I/O characteristics from others.  Setting different
effective_io_concurrency parameters for those has been measured to
improve performance.

Author: Julien Rouhaud
Reviewed by: Andres Freund
This commit is contained in:
Alvaro Herrera
2015-09-08 12:51:42 -03:00
parent 665a00c9e2
commit 1aba62ec63
12 changed files with 145 additions and 63 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
src/backend/utils/cache/spccache.c vendored
View File

@@ -23,6 +23,7 @@
#include "commands/tablespace.h"
#include "miscadmin.h"
#include "optimizer/cost.h"
#include "storage/bufmgr.h"
#include "utils/catcache.h"
#include "utils/hsearch.h"
#include "utils/inval.h"
@@ -198,3 +199,14 @@ get_tablespace_page_costs(Oid spcid,
*spc_seq_page_cost = spc->opts->seq_page_cost;
}
}
int
get_tablespace_io_concurrency(Oid spcid)
{
TableSpaceCacheEntry *spc = get_tablespace(spcid);
if (!spc->opts || spc->opts->effective_io_concurrency < 0)
return effective_io_concurrency;
else
return spc->opts->effective_io_concurrency;
}