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« Linux Oracle tuning parameter : Shared Memory | Main | Linux Oracle tuning parameter : shmmax and shmall »

Linux Oracle tuning parameter : Semaphores

By Martin | June 5, 2009

To view current settings, run command:
more /proc/sys/kernel/sem
250 32000 32 1024

To set it to a new value for this running session, which takes effect immediately, run command:
echo 500 512000 64 2048 > /proc/sys/kernel/sem
Parameters meaning:
SEMMSL – semaphores per ID
SEMMNS – (SEMMNI*SEMMSL) max semaphores in system
SEMOPM – max operations per semop call
SEMMNI – max semaphore identifiers

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Topics: LINUX, Oracle | No Comments »

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