On Tue, 2009-06-02 at 13:40 -0400, jsie...@psu.edu wrote: > > Cache file is the part of Dovecot that demands the most > > from the OS/filesystem. The most difficult part is probably that it > > writes to the file without locking. It first reserves a space and then > > starts writing there. Multiple processes can write to the same file at > > the same time. This should probably be changed at some point, since it > > could just buffer more data to memory and then lock, write, unlock. That > > would also make the code simpler, since it can currently leave holes to > > the file because it has to guess initially how much space to reserve.. > > > > > Ok. Should I disable Cache file or what would be the best fix?
If you do that, you'll lose all the performance advantages of Dovecot. Do you already have mmap_disable=yes? You could also try if setting mail_nfs_index=yes happens to help.
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