[Dovecot] imaptest10 and stalled messages
Timo Sirainen
tss at iki.fi
Sun Apr 1 09:57:58 EEST 2007
On 30.3.2007, at 21.24, Mike Brudenell wrote:
> 2. How much real-life user load does running imaptest10 with 50
> simulated
> clients equate to? I assume each simulated user is hammering
> away at
> its IMAP connection, so should equate to several (how many?)
> normal
> users in real-life operation?
I don't know, but most IMAP connections are just idling, so it could
be anything from 10-100x.
> 3. I'm concerned by the N/M number at the end of the imaptest10
> output
> lines plummeting whenever one process goes into this stalled
> state:
> it almost suggests as if the only thing the other processes can
> do is
> logout? Are other sessions really being blocked, or is it just
> imaptest10 behaving like this?
It's just imaptest. If it detects one connection stalling, it stops
making new connections to the server until the stall goes away.
That's however a good way to detect what it is that's stalling. Just
wait for a while until there are only stalled connections, and you
can truss the imap connections to see what they're doing. Are they
waiting for some locks?
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