Re: Virtual memory errors

Check the install notes. There should be some kernel parameter change information in there as well a a lot of useful information in regards to your platform. On a more professional level, it is always a good idea to read the install noted before installing. SC > Morning All, > > yep, tis I, the DBA without manuals, lol, but seriously, > we just upgraded to 7.31.UC4 as I mentioned prev, > this morning we get: > > shmat: [EMFILE][24]: out of shared memory segments, check system > SHMSEG > > We are running AIX 4.3.3, when I looked at the informix user, > the limits were set to unlimitted, too wierd, informix > was only using 312MB per onstat -p > > vmstat showed zip, just that we were running a little low on > ram, 100mb of paging space used which doesnt concern me much. > > According to the release notes, shared memory residency is not > supported on this platform. > > Any ideas folks? > > brett

Yep, someone mentioned something to me some time back about this sort of thing, seems AIX 4.2.1 allowed a max of 256MB of shared memory for an app... period... AIX 4.3.3 however allows 2GB... but only 11 calls to shmget(), however informix grabs 4 on startup. period. So, although we could override the 11 limit, we would endup losing memory in vast chunks (see the man pages for a descrip) Now, this is obviously a bad thing. Solution, change SHMVIRTSIZE to some nice large value, I'm no grabbing 32MB to begin with, that runs for a few hours before informix requires more, and as I see it, even at high load, informix wasnt grabbing much, so I just set SHMVIRTSIZE up a little and SHMADD up aswell... thanks or the pointer though brett In article <8m6npv$nja$1@news.xmission.com>, sfcawley@interaccess.com says... > > Check the install notes. There should be some kernel parameter change > information in there as well a a lot of useful information in regards to > your platform. > > On a more professional level, it is always a good idea to read the > install noted before installing. > > SC > > > Morning All, > > > > yep, tis I, the DBA without manuals, lol, but seriously, > > we just upgraded to 7.31.UC4 as I mentioned prev, > > this morning we get: > > > > shmat: [EMFILE][24]: out of shared memory segments, check system > > SHMSEG > > > > We are running AIX 4.3.3, when I looked at the informix user, > > the limits were set to unlimitted, too wierd, informix > > was only using 312MB per onstat -p > > > > vmstat showed zip, just that we were running a little low on > > ram, 100mb of paging space used which doesnt concern me much. > > > > According to the release notes, shared memory residency is not > > supported on this platform. > > > > Any ideas folks? > > > > brett > >