Re: BUFFERS! Arghhh!!! Please help before I do something silly!
Posted in 2004
Topics: Performance & Tuning, Storage & Space Management, Logging & Checkpoints
I don't know what rule or recommendation are you following but if I
increase buffers I would increase LRUS to spread buffers along LRUS.
If you keep the same value for buffers and increase LRUS you 'll
decrease the number of buffer per LRU.
esteban.-
"David Williams" <djw@smooth1.fsnet.co.uk> wrote in message news:<c6rhje$vjg$1@news7.svr.pol.co.uk>...
> "sumGirl" <emebohw@netscape.net> wrote in message
> news:a5e13cff.0404290943.71aa323@posting.google.com...
> > > CLEANERS and LRUS seem to be sufficient without more info. How many
> chunks
> > > do you have? Set CLEANERS to at least 1.5*#chunks plus a few, if the 84
> is
> > > more than that then leave it. Looks like you're running 9.4, try
> reducing
> > > LRU_MAX/MIN_DIRTY to 1.0 and 0.5 or 1.0 & 0 that alone should cut
> checkpoint
> > > time in half.
> > > Art S. Kagel
> >
> > Thanks again Art. I have 137 chunks, so about 210? I was thinking that
> > there was a rule that when you raise the number of CLEANERS, you
> > should also up the LRUs? I likely am way off base there, I dont know.
> >
> > I will tweak the CLEANERS and then if needed lower my MAX/MINs...which
> > is another confusing subject based on the 9.4 Performance Guide.
> >
>
> CLEANERS 127
> LRU 127>
> After a while look at onstat -u and the informix ones at the top are the
> page cleaners. Check if
> any have all 0's against them and adjust accordingly allowing for futures
> peaks in load.
>
> > Thanks for all the wisdom!
This is the friendliest and most prolific discussion group I have ever been in, no one has implied I am a knucklehead and thats very refreshing! -thanks :)
"sumGirl" <emebohw@netscape.net> wrote in message news:a5e13cff.0404300621.2e638651@posting.google.com... > This is the friendliest and most prolific discussion group I have ever > been in, no one has implied I am a knucklehead ... Yet. Only because you're a girlie and we don't get to talk to many of those since Impy went SQL Server. :-)
"neil truby" <neil.truby@ntlworld.com> wrote in message news:Qvzkc.73$If2.23@newsfe5-gui.server.ntli.net... > > "sumGirl" <emebohw@netscape.net> wrote in message > news:a5e13cff.0404300621.2e638651@posting.google.com... > > This is the friendliest and most prolific discussion group I have ever > > been in, no one has implied I am a knucklehead ... > > Yet. > Only because you're a girlie and we don't get to talk to many of those since > Impy went SQL Server. > :-) > Impy went SQL Server?? When?? I knew she disappeared... >
"sumGirl" <emebohw@netscape.net> wrote in message news:a5e13cff.0404300621.2e638651@posting.google.com... > This is the friendliest and most prolific discussion group I have ever > been in, no one has implied I am a knucklehead and thats very > refreshing! > > -thanks :) No problem.. .. .. .. see I can be nice...