[Dovecot] Performance, dovecot vs tpop3d

[Jens Knoell]

On 01/30/2007 04:31 PM, Nate wrote:
> At 02:52 PM 1/30/2007, Curtis Maloney wrote:
>> Nate wrote:
>>> files.  The process takes many minutes to complete.  Is it 
>>> rebuilding the index on every login?
>>
>> The only case I can see where Dovecot would rebuild indexes on 
>> _every_ connect would be if you had INDEX=MEMORY in your mail_location.
>
> mail_location = maildir:/var/spool/mail/%d/%n
> That is my whole config line, so it stores the indexes within the mail 
> directory.  here's a directory listing of the user previously mentioned.
> [root at s3 brock]# ls -alh
> total 7.4M
> drwx------     5 postfix postdrop  304 Jan 30 15:21 .
> drwx------  3108 postfix postdrop  79K Jan 30 13:06 ..
> drwx------     2 postfix postdrop 939K Jan 30 15:21 cur
> -rw-------     1 postfix postdrop 202K Jan 30 15:21 dovecot.index
> -rw-------     1 postfix postdrop 5.3M Jan 30 15:21 dovecot.index.cache
> -rw-------     1 postfix postdrop  17K Jan 30 15:21 dovecot.index.log
> -rw-------     1 postfix postdrop 133K Jan 28 11:18 dovecot.index.log.2
> -rw-------     1 postfix postdrop 743K Jan 30 15:19 dovecot-uidlist
> drwx------     2 postfix postdrop   48 Jan 30 15:21 new
> drwx------     2 postfix postdrop   48 Jan 30 15:19 tmp
>
> For kicks I copied their entire mailspool (minus the index files) to a 
> test account and connected to it via telnet.  It took roughly 90 
> seconds to build the indexes, then it output the list command.  If I 
> disconnect and immediately reconnect it returns a list immediately and 
> does not appear to rebuild the index; however, if I wait 5 minutes and 
> reconnect, it appears to at least somewhat rebuild the index (guessing 
> at this).  I see it accessing the individual mail files inside the 
> cur/ directory with lsof and it takes about 30 seconds to retrieve a 
> list.
>
> - Nate
Just a wild guess... you're not using dovecot's own LDA, do you? If not, 
that would at least somewhat explain the re-indexing.

Jen
-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/x-pkcs7-signature
Size: 3237 bytes
Desc: S/MIME Cryptographic Signature
Url : http://dovecot.org/pipermail/dovecot/attachments/20070130/7766bd42/attachment.bin