How to check the amount of free memory in share memory

How to check the amount of free memory in share memory

Post by Mr. Kai Cheong L » Tue, 18 Jan 2000 04:00:00


I know that ipcs can check the owner of the program using the shared
memory.  How to check whether the amount of available share memory in
the system?


1. Free Virutal Memory is 1% even though Total Free Virtual Memory is above 1GB

Configuration: Sun Ultra 450
O/S: Solaris 2.6 sparc
Volmgt: Veritas Volume Mgmt
        root disk is encapsulated ( including rootvol,
swapvol )

I have been observing this in about 25 Unix servers here.
Each of the servers has 1GB of MainMemory and have 1GB of
Swap Space defined. When Swap statistics are taken ( either
with Sar or vmstat ) system shows Free Memory <= 1% under
full load conditions. But system does not seem to use the
Virtual Memory nor try to swap out processes and make room
for the new processes.

Can anybody suggest a solution ?? Did anyone come across
any such situation ?

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