On May 29, 2012, at 2:21 PM, Timo Sirainen wrote: > On 29.5.2012, at 13.23, Cor Bosman wrote: > >> Hey all, im experimenting with dovecot stats service, and graphing the >> result. My initial results are kind of interesting. Check out this graph >> showing connected sessions and users: >> >> http://grab.by/dReu > > How do you get the list? Are you periodically just getting list of > sessions/users with doveadm stats dump? > >> Anyone have any idea what could cause such a pattern? Maybe dovecot does >> some cleaning up of idle sessions at specific intervals? Or maybe our >> loadbalancers do, or the imapdirectors. > > doveadm stats dump by default dumps a lot of historic data as well. If you > want to see only the currently connected sessions/users, add "connected" > parameter. > > Note that I'm not entirely sure what would be the best API for getting the > stats. I'm also thinking that for best behavior the stats process should > simply be dumping the data to some permanent database, and you'd do the > lookups from there. Otherwise data is lost when Dovecot restarts. The dumping > to db could already be done with a "doveadm stats dump" cronjob that runs > e.g. once a minute. > > And/or perhaps stats process should be saving its state permanently to > /var/lib/dovecot/ and loading it at startup. Still, a permanent DB would > probably be better for some purposes.
Yes, I am getting a list of sessions/users every 5 minutes through cron. Im already using "doveadm stats dump session/user connected" It's not a big deal or anything, just wondering about the weird patterns. If it's really dropping/gaining connections, id like to figure out why. Cor
