Linux-kernel mailing list archive 1999-34,: Re: Oracle and Linux (hand in hand)

# Re: Oracle and Linux (hand in hand)

Matthew Kirkwood (weejock@ferret.lmh.ox.ac.uk)
Sat, 28 Aug 1999 12:17:13 +0100 (GMT)

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On Sat, 28 Aug 1999, Matthew wrote:

> I've read tuning tips wrt Oracle on Linux. Most say to increase
> SHMMAX and the semaphores. I ask you this, what _real_ difference
> does it make? Am I going to be able to see the difference on a VA3500
> (quad pent III 550,512M RAM)? I'd much rather use a stock kernel, but
> I'll hack for the good of my users.

I presume you'd be running a 2.2 kernel, in which case SHMMAX is
tunable via /proc/sys/kernel/shmmax.

You appear to be limited to 128 semaphore ids at 32 sems per id.

I've never really used SysV IPC, but I suspect that 4K semaphores
"should be enough for anybody".

Matthew.

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