Virtual memory errors

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