Thanks Chris, the link explains clear and easy to understand. I think the total number of exim processes related to the CPU cores or memory size? What's suggested parameter values? Or should I test and adjust and work it for my machine(24cores /proc/cpuinfo, 64G mem)?
On Mon, Aug 19, 2013 at 10:34 PM, Chris Siebenmann <[email protected]>wrote: > | > queue_run_max Use: main Type: integer Default: 5 > | > This controls the maximum number of queue runner processes that an Exim > | > daemon can run simultaneously. > | > | -> as written: the maximum number of parallel running Exims processing > | the current mail queue. This number is independend on the load of your > | system. As each process locks one message, it's the maximum number of > | of messages delivered at the same time. (Not the maximum number of > | deliveries, as each message may have several recipients, which Exim > | may deliver to in parallel.) > > queue_run_max is not quite the maximum number of simultaneous > deliveries that Exim may ever be doing at once, because it only limits > *queue runners*. Exim load and load limiting is complicated because Exim > can deliver email both from queue runners *and* immediately when the > email is submitted. So you can have some number of queue runners (up to > queue_run_max) and also some number of immediate delivery processes. > > Years ago I tried to write down everything I had worked out about > Exim load limiting. I think that nothing substantial has changed > since 2008 when I did this and the following is still relevant if > people want lots of detail: > > http://utcc.utoronto.ca/~cks/space/blog/sysadmin/EximLoadLimiting > > (If things have changed I'd love to hear about it.) > > - cks > > -- > ## List details at https://lists.exim.org/mailman/listinfo/exim-users > ## Exim details at http://www.exim.org/ > ## Please use the Wiki with this list - http://wiki.exim.org/ > -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
