Chris wrote:
[...]
>
>
> HI I posted in another thread about how my own
experiences seem to
> differ from all these benchmarks, they are based on 3
heavily loaded
> web/mysql servers.
>
> One is freebsd 6.1 dual core cpu (not htt). 2nd is dual
xeon freebsd
> 6.1 and 3rd is another dual xeon freebsd 6.1.
>
> All 3 of these machines perform better as well as more
stable under
> higher loads using libpthread process scope.
>
> System scope appears to make mysql hog the system and
everything slows
> down except of course mysql.
Is this libpthread "system scope" or libthr (which
has system scope by
default)?
>
> Libthr appears to make mysql very sporadic with some
requests fast
> others with a unexplained 5-10 sec delay including
timeouts.
>
> Process scope on libpthread gives me the best results
not making mysql
> starve the server of resources and it has a consistent
response time
> of under 2 seconds under heavy loads.
this is interesting.. there has been a call to remove
"fairness"
as a threading property as it complicates the scheduler.
It has been said by many that they do not consider this as
an important
feature and it reduces throughput.
>
> I cant explain other then it maybe that test mysql data
isnt a proper
> way to test these threading libraries only real work
loads can.
>
> Chris
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