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Re: fork/exec for hooks scripts with a large FSFS cache

From: Philip Martin <philip.martin_at_wandisco.com>
Date: Fri, 16 Nov 2012 10:43:47 +0000

Peter Samuelson <peter_at_p12n.org> writes:

> [Philip Martin]
>> If I configure a server with an FSFS cache that uses about 50% of
>> available memory and then I use the server so the cache is in use I
>> find that hook scripts fail to run because the fork/exec cannot
>> allocate memory.
>
> You didn't say what OS this is. It matters. Some are configured to
> overcommit RAM allocation, because a lot of software tends to allocate
> far more RAM than it actually needs. (fork() is only one case of
> this.)

I was using Linux with heuristic overcommit (overcommit_memory=0,
overcommit_ratio=50) and no swap.

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Received on 2012-11-16 11:44:26 CET

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