On Jun 22, 2006, at 2:24 AM, Jérôme BENOIS wrote:
We use 7.4.6 version and now we have a bad performance on our
You should upgrade to the latest 7.4 version.
production server. We detected several strange messages in a log
file :
LOG: statistics buffer is full
LOG: statistics buffer is full
LOG: statistics buffer is full
When i search on mailings list archive, i found a patch to increase
the
buffer size in src/include/pgstat.h
-#define PGSTAT_RECVBUFFERSZ ((int) (1024 * sizeof(PgStat_Msg)))
+#define PGSTAT_RECVBUFFERSZ ((int) (16384 * sizeof(PgStat_Msg)))
And when i look the same file on the subversion trunk, the
"PGSTAT_RECVBUFFERSZ" constant is defined in a new file :
src/backend/postmaster/pgstat.c but with a same value.
Can you explain this statistics buffer problem ? And increase this
buffer size is a good resolution ?
Do you have stats_command_string=on? If so, your best bet is probably
to disable that, because it has a very high overhead (I've seen as
much as over 50%). FWIW, Tom recently made changes in HEAD that
essentially remove the overhead for using stats_command_string.
--
Jim C. Nasby, Sr. Engineering Consultant jnasby@xxxxxxxxxxxxx
Pervasive Software http://pervasive.com work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461
