Re: Performance Problem

Our config, RS/6000 model H70 with 2x 334 processors and 768MB ram, vmstat showed huge amounts of memory gone after a few hours... The solution... ibm's filesystem cache, reduce the load using vmtune poof, memory loss gone. Now we have some memory leaks elsewhere but those I'll find. brett stasis wrote: > > I have an IBM rs6000 (4x166 processors) and 1.5 G Ram running Informix > 7.24. The problem is that unless I cripple Informix using the SHMTOTAL > directive in the onconfig (set to 700M) the system goes so slow that no one > can use it, which also results in AIX reporting fork failures due to > insufficient memory. > If I let Informix do its own thing and set SHMTOTAL to zero (unlimited) > Informix appears to allocate far more memory than it needs to, all stats > appear normal. > > In addition if I up the BUFFERS to a point where the Informix instance uses > for than 500M of memory I also get the same problem. > > If anyone has come across this problem I would love to hear from you. > > Regards > > Callum > > callum@stasis.f9.co.uk -- ----------------------------------------------------------------- Brett's ninth law of UNIX administration... Ye shall read the words: http://cm.bell-labs.com/who/ken/index.html http://cm.bell-labs.com/who/dmr/index.html ----------------------------------------------------------------- Brett Geer - UNIX Admin/Analyst/Programmer - Intratex Holdings. Tel. +27 31 717 4000 Direct. +27 31 717 4146 Fax. +27 31 717 4001 ----------------------------------------------------------------- If you have any trouble sounding condescending, find a Unix user to show you how it's done. --Scott Adams -----------------------------------------------------------------