OEL 5.5 and Oracle 10.2.0.5 low decrease of memory
I have an issue with few servers.
All have OEL 5.5 and various versions of oracle (mainly 10g something).
I've noticed on one machine that amount of free memory is slowly decreasing. When it comes to less then 30M, application has problems.
Ive tried adding mem on this machine (virtual), and it behaves the same.
The same is on physical machines I have simmilar, if not the same config. Variations are with physical memory installed, and it does not matter if servers have 2G, or 8G, free -m gives around 30 free
It does not swap, and does not make some big issues on other machines, but on this one, application that uses this DB timeouts the user.
Is there some chance to check what is creating this issue?
P.S. I've tried with DB admin to check something related to oracle itself, bit when we shutdown instance, Oracle frees 1.5G allocated to him, but nothing else.
Will try testimg a bit more, but any thought on this is usefull.
This is production server, so no big issues can be done. Will try to copy it to other hardware and do some testing, but then no App server available to attack it.