Re: [PATCH 1/2] ipc semaphores: reduce ipc_lock contention in semtimedop

From: Manfred Spraul
Date: Thu Apr 15 2010 - 12:33:19 EST


On 04/14/2010 09:50 PM, Chris Mason wrote:
On a big system I saw about 4000 semaphores total. The database will
just allocate as many as it can into a single array and keep creating
arrays until it has all it needs.

What happens if SEMMSL is reduced (first entry in /proc/sys/kernel/sem)?

--
Manfred
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