[ravinayag]

Hi,
when i excute ipcs command , its nothing shown the status of memory,
mesge ques,
but when i check with ps command, lot of demaons are running,
Apache,nfs,mail services
what would be the problem,.?
below i shown the output...

bash-3.00[/usr/bin]# ipcs
IPC status from /dev/mem as of Fri May 1 08:15 0:00 IST 1970
T ID KEY MODE OWNER
GROUP
Message Queues:
Shared Memory:
Semaphores:
bash-3.00[/usr/bin]#
let clear me about this ....
Appreciating the responces....

[FASherman]

As root, type:

# ipcs -mp

The output should look similar to this:

IPC status from /dev/mem as of Thu May 24 23:30:47 CDT 2001
T ID KEY MODE OWNER GROUP CPID LPID
Shared Memory:
m 0 0x580508f9 --rw-rw-rw- root system 5428 5428
m 1 0xe4663d62 --rw-rw-rw- imnadm imnadm 14452 14452
m 2 0x9308e451 --rw-rw-rw- imnadm imnadm 14452 14452
m 3 0x52e74b4f --rw-rw-rw- imnadm imnadm 14452 14452
m 4 0xc76283cc --rw-rw-rw- imnadm imnadm 14452 14452
m 5 0x298ee665 --rw-rw-rw- imnadm imnadm 14452 14452
m 6 0xffffffff --rw-rw---- root system 5202 5202
m 7 0x7804129c --rw-rw-rw- root system 17070 20696
m 8 0x0d05320c --rw-rw-rw- root system 19440 23046

CPID is the process ID using the shared memory segment.

Keep in mind, we're talking about shared memory and semaphores. This is not the same as system memory. Shared memory is used by processes or threads to pass data back and forth. Semaphores are used for locking segments when in use by a thread and message queues are a method for threads or processes to communicate between each other when they have updated a segment.

If you're looking for something to show how much system and or/kernel virtual memory a process is using, then you'll want to use the svmon command.

[ravinayag]

hi
I executed the cmd,
It showing the same, no values are displayed.

bash-3.00$ ipcs -mp
IPC status from /dev/mem as of Thu Jun 1 09:30:00 IST 1970
T ID KEY MODE OWNER GROUP CPID LPID
Shared Memory:
bash-3.00$

I need to know y its not showing.... the values of shared mem



Ravi

[FASherman]

Because you have no processes using shared memory.