[Dovecot] Dovecot performance issues with many writes

[Peer Heinlein]

Am Donnerstag, 17. November 2011, 22:30:07 schrieb Andy Robbins:

> We are currently experiencing performance issue with our Dovecot
> system which we believe is caused by excessive writes to the dovecot
> files. The confusing thing is that we are seeing more writes than
> reads on our Dovecot volume when you would assume that most of the
> IO should be reads from customers checking their mail.

Yes, but your read-requests are answered from your local kernel-buffer / 
cache and aren't really read from your hard-disk.

(At least if you have enough free memory for a cache, that's large 
enought.)

Incoming mails ARE written on the disk, but read later on just from your 
cache.

Peer



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