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Re: intermittent very high waits in LGWR on Linux?

From: Fabrizio <fabrizio.magni_at_mycontinent.com>
Date: Sun, 03 Jul 2005 19:28:06 GMT
Message-ID: <a%Wxe.29547$h5.1344646@news3.tin.it>


bugbear wrote:
--->> 14:40:47.224930 semop(720898, 0xbfffe6b0, 1) = 0

I'm only guessing but I would bet sem_op is negative in that syscall (and a portion of pseudo-code on metalink is enforcing by belief).

I'd say semop is waiting for a semaphore to be released so I'd look inside oracle more than at the OS level.

If you are unsure try simply to change the kernel with a newer 2.4 (since you are there) vanilla and see what happens.

This call is also interesting:

setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={1, 380000}}, NULL) = 0

Your semop will never wait "too long"...

Regards

-- 
Fabrizio Magni

fabrizio.magni_at_mycontinent.com

replace mycontinent with europe
Received on Sun Jul 03 2005 - 14:28:06 CDT

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