I read the ipcs man page and am still very confused.
Basically, I just want to know whether the output from the ipcs command below means these are the current "TOTAL" memory usage in bytes on the server? Is this correct?
Thanks in advance.
ipcs command output below:
Code:
# ipcs
IPC status from <running system> as of Wed Aug 11 18:37:40 EST 2010
T ID KEY MODE OWNER GROUP
Message Queues:
Shared Memory:
m 1090519155 0x455cd2dc --rw-r----- oracle oinstall
m 67108928 0x7a00a10c --rw-rw-rw- sybase other
Semaphores:
s 335544444 0x38597ec2 --ra-r--r-- root root
s 671088731 0x27af6c54 --ra-r----- oracle oinstall
s 218103855 0x7a00a10c --ra-ra-ra- sybase other
#
No it isnt. Ipcs only lists Memory Queues, Shared Memory and Semaphores used on the system. There are lots of other IPC's on UNIX, included Memory Mapped files, pipes and sockets. To be honest the IPC's command doesnt really give you much useful information these days. Can I ask what it is you are actually after and what O/S you are on ? Other commands like "top", "vmstat" and "sar" can give more useful info.
This is a Solaris zone/container and the server has been assigned 8192M and the available memory for the whole zone/container is presumably 72G.
I thought if I run vmstat, it will show me how much of the 8192M is free but sadly that does not seem to be the case.
The output of vmstat command is as below.
The free seems to be for the whole Solaris container or am I wrong and should be calculating free as the value from vmstat minus the 72GB from the top command and that should give me how much of the 8129M is free?
In short, should I be calculating the free memory of the server as the (value of free from vmstat) - (value of free from top)
Any advise will be very much appreciated. Thanks in advance.
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