> Your file system is bottle necking the speed at which bounced
> recipients can be appended to the bounce log file.
>
> I have no quick fix available (like redesigning the way Postfix
> appends bounced recipients to a bounce logfile).
>
> Get a faster disk, turn off synchronous syslogging, check your
> ext3fs parameters, as discussed here they can affect mail system
> performance big time.
>
> Wietse

Ok, all of the above suggestions are already implemented. ext3 is tuned,
syslog logs async and only logs notice and above, so it logs very litte -
only the described errors, not info about sending messages. the disk is on
fast scsi mirror that gives very good performance (and as i see i need an
increase of a magnitute, not increasing times 1.5 or 2, which i can get
upgrading the hd). i can send 200000 35k messages/hour this way, so for me
it is satisfactory. Let's say i leave this as is - do i loose the bounces in
this situation or they are resent after the mega-mail is sent out ?
generally, this is not a large problem for me, because as far as i can see i
get less then 0.1% of postfix-generated bounces ...

i could try running the queue on a ramdrive, this is a stable enviropment -
this will probably solve the problem, and in case of system failure, i will
always be able to extract from the logs who did i already send the email to,
although i don't think that the bounces worth the trouble, and i will have
to syslog all the info about the messages sent.

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