Re: [Issue 3980] serf increases server load

Stefan Fuhrmann <stefan.fuhrmann_at_wandisco.com> writes:

>> > Using serf 1.1.x_at_1691 and subversion trunk_at_1408335 as 1.8.
>> > Using 1.7.7 with neon as 1.7.
>> > Using subversion trunk as my dataset.
>> >
>> > The server CPU and bandwidth to service one checkout:
>> >
>> > 1.7 neon client, 1.7 server
>> > 3.6s, 21.4MB
>> >
>> > 1.8 serf client, 1.7 server
>> > 2.9s, 46.9MB
>> >
>> > 1.7 neon client, 1.7 server, mod_deflate
>> > 5.3s, 15.4MB
>> >
>> > 1.8 serf client, 1.7 server, mod_deflate
>> > 5.7s, 15.9MB
>> >
>> > 1.7 neon client, 1.8 server
>> > 3.3s, 21.4MB
>> >
>> > 1.8 serf client, 1.8 server
>> > 1.6s, 44.7MB
>> >
>> > 1.7 neon client, 1.8 server, mod_deflate
>> > 4.8s, 15.4MB
>> >
>> > 1.8 serf client, 1.8 server, mod_deflate
>> > 4.1s. 14.7MB
>>
>
> How long does it take to do e.g. 4 c/o in parallel
> to some ramdisk with hot server caches? That
> would give some indication on the server CPU usage.

Those figures are the amount of CPU used by the server. In each case I
did 10 consecutive checkouts without restarting, so 1 cold-cache and 9
hot-cache. How would running checkouts in parallel add more
information?

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