[horde] datatree, sql vs null

Michael M Slusarz slusarz at horde.org
Tue Mar 23 20:41:33 UTC 2010

Quoting Hans Morten Kind <Kind at it.uib.no>:

> We are running IMP as a webmail-service along with our general
> imapservers, including horde_prefs, turba, kronolith and ingo supported by
> apache and postgres served by redhat. The imap-backends runs solaris with
> dovecot using zfs.  We have been running IMP since Jan-99 having app 7000
> daily users peeking on 1200 concurrent users.
> The webmail-server has been running with a load above 5 with several
> postgres-processes claiming most cpu. Looking on output from
> log_statements most sql-acesses were towards the tables of the the
> datatree. When I switched from sql to null as the datatree driver in
> horde/conf/conf.php, the load on the server sunk to under 0.5, the
> postgres-processeses disapeared from 'top' and IMP responded better.
> I can see no loss of functionality disabling the sql-driver of datatree.
> Am I wrong?

Read horde/docs/PERFORMANCE or search the list archives.  This topic  
has been discussed many times before.


Michael Slusarz [slusarz at horde.org]

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