Re: [exim] High Perf server - was (exim allowed someone to s…

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著者: Nigel Metheringham
日付:  
To: exim-users
題目: Re: [exim] High Perf server - was (exim allowed someone to slam my mailserver for 3 hours)
On Wed, 2005-06-29 at 14:25 +0200, Daniel Tiefnig wrote:
> Mark Lowes wrote:
> > We hit a bottleneck in db access when I rolled out the ratelimiting,
> > moving to a ramdisk has resolved the problem for the moment, though
> > I'm not entirely sure what the next step will be.
>
> Shouldn't this make no difference on any reasonable Operating System?
> The hints DB should always be in RAM anyways, so I don't see how it
> should speed up significantly by placing them on a ramdisk.
> Does exim do sync() on its hint DBs?


The underlying database engine (db/dbm/gdbm) would almost certainly sync
the files to ensure other processes are getting consistent data.

    Nigel.


-- 
[ Nigel Metheringham           Nigel.Metheringham@??? ]
[ - Comments in this message are my own and not ITO opinion/policy - ]