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postfix-users: Re: some watchdog timeout

Re: some watchdog timeout

From: Jeroen Geilman <jeroen_at_nospam>
Date: Sun Oct 10 2010 - 10:26:28 GMT

On 10/10/2010 10:33 AM, Patrick Proniewski wrote:
> On 10 oct. 2010, at 02:41, Wietse Venema wrote:
>> Postfix daemons terminate voluntarily when they receive no request
>> for $max_idle seconds. The watchdog timer is a safety mechanism;
>> it terminates a process when it appears to hang.
>> The $max_idle timer uses select(2), poll(2), epoll(3) or /dev/poll
>> depending on the operating system type and version. Failure of this
>> timer is usually a symptom of virtualization bugs.
> That's interesting! Thank you. The FreeBSD server running those postfix is a virtual machine on top of VMWare ESXi, and running VMWare Tools.
> I'll try to get some support from VMWare (and FreeBSD users), but if someone here has an idea (vmware issue? bios tuning? freebsd tuning?...) I'd be happy to read about it.
> thanks,

I'd start with the version of postfix you're running - what is it ?
I run postfix on half a dozen vmware ESX guests, all of them Ubuntu,
never had any sort of problem with this.
They all run 2.6 or higher.

-- J.