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Re: BDB vs FSFS - OMG!

From: Stefan Fuhrmann <stefan.fuhrmann_at_wandisco.com>
Date: Mon, 18 Feb 2013 11:16:33 +0100

On Mon, Feb 18, 2013 at 11:04 AM, Philip Martin
<philip.martin_at_wandisco.com>wrote:

> Stefan Fuhrmann <stefan.fuhrmann_at_wandisco.com> writes:
>
> > Apache configuration (~1GB cache, mpm-worker):
> >
> > SVNInMemoryCacheSize 1000000
> > SVNCacheFullTexts On
> > SVNCacheTextDeltas On
> > SVNCacheRevProps On
> > SVNCompressionLevel 0
>
> I see no mention of tuning the BDB repository.

Just scroll up by 3 lines ;)

I set the BDB cache to 1GB as well but that did not have
a measurable effect. Also tried 10MB in case that merely
initializing a large cache comes at an extra cost (results
did not change, though).

> There are several things
> you can tweak in db/DB_CONFIG including cache size, log size, number of
> locks, etc? Cache size in particular needs to be set:
>
>
> http://docs.oracle.com/cd/E17076_02/html/programmer_reference/general_am_conf.html#am_conf_cachesize
>
> I did not change log & lock settings because I ran r/o
operations only.

-- Stefan^2.

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Received on 2013-02-18 11:23:47 CET

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