On 12/09/13 14:25, Gordon Messmer wrote:
>> A crazy thought on this issue... what if couriersmtp and friends were
>> run at the very lowest cpu and i/o priority possible, would that tend
>> to "naturally rate limit" courier in general?
>
> Not really. Not unless something else on the system were using the CPU
> and IO time at a higher priority.
But that is the point, every other process, except for the last 1/2 dozen
below, are running at a nice of 0 through to -20 (highest priority). It's
only khugepaged that would be at the same niceness as what I am suggesting
for the courier daemons. "nice -n19" is the lowest priority possible and
"ionice -c3" is for when the block storage device is idle.
ionice -c3 nice -n19 /usr/sbin/couriertcpd [...]
~ ps -el --sort=ni | tail | awk '{print $8"\t"$14}'
0 tail
0 chromium-browse
0 chromium-browse
0 chromium-browse
1 rtkit-daemon
5 ksmd
15 bindgraph.pl
15 couriergraph.pl
15 preload
19 khugepaged
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