Re: LOG: statistics buffer is full

Hello,

Thanks Jim, i change stats_command_string=false and i wait but it's
works now :-)

Jérôme.

Le jeudi 22 juin 2006 à 21:00 -0500, Jim Nasby a écrit :
> 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(at)pervasive(dot)com
> Pervasive Software http://pervasive.com work: 512-231-6117
> vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461
>
>
>