postgresql-performance using sysbench

[Claus Guttesen]

> >I had (allready) saved the thread in my mail-account so I could look
> >it up before I started testing. :-) So I compiled postgresql with the
> >option WITH_THREADSAFE=true and used sysbench with --pgsql-host="" .
> >As pointed out by Ivan my test also involved r/w whereas the thread
> >you (probably) mention at
> >http://groups.google.com/group/mailing.freebsd.stable/browse_thread/thread/e224cd4f76e9ec2d
> >is a read-only test.
> >
> >I forgot to mention in my first post that I'm using ULE. The p800
> >controller has a (factory set) 25/75 read/write cache ratio.
>
>
> I am still going through my own testing.  One thing I noticed, on a
> 4G RAM machine (still waiting for the RAM to test with 8G), the disks
> are not that busy.  It seems to be the CPU that is the bottleneck on
> FreeBSD.  I tried the test with 900,000 rows instead.
>
>   procs      memory      page                    disks     faults      cpu
>   r b w     avm    fre   flt  re  pi  po    fr  sr ad5
> da0   in   sy   cs us sy id
> 38 1 0  271024 3439656  6329   0   0   0     4   0   0 1703 1709
> 120725 41505 44 18 37
>   0 38 0  271024 3438860  9590   0   0   0     8   0   0 1932 1938
> 183844 47958 70 28  3
>   6 33 0  271024 3438120  7814   0   0   0     0   0   0 1823 1827
> 169969 44914 62 25 13
> 39 0 0  271024 3437960  1530   0   0   0     0   0   0 994  998 36521
> 14927 13  8 79
> 38 1 0  271024 3437244  7374   0   0   0     0   0   0 2724 2731
> 173493 51821 71 20  9
>   0 39 0  271024 3436620  4773   0   0   0     8   0   0 2727 2734
> 125699 39962 47 20 33
> 37 1 0  271024 3435836  6884   0   0   0     8   0   0 2796 2804
> 177453 58430 70 26  4
>
> I am also using ULE, pgsql with WITH_THREADSAFE=true and not using
> TCP to connect.  How busy were your disks in your testing ?

Approx. 15-25 MB with spikes at approx. 45-50 MB. Context-swithces
were sometimes 140.000 with 20-30 clients (systat -vmstat 1).

-- 
regards
Claus

When lenity and cruelty play for a kingdom,
the gentlest gamester is the soonest winner.

Shakespeare