[Samba] Samba performance issues

Bradley W. Langhorst brad at langhorst.com
Tue Sep 24 21:05:01 GMT 2002


try installing iostat
that should give you a measure of how much 
cpu time disk access costs you.

the hardware seems appropriate to me
I use software IDE raid 5

maybe there is some problem with your scsi driver??

brad
On Tue, 2002-09-24 at 16:51, John Coston wrote:
> it's software RAID-1 using two fast wide scsi 36 gb discs. Filesystem 
> is ext3. We have one 30gb partition for share data, and the rest is for 
> system and swap.
> here is some of output from dmesg:
> 
> md: md driver 0.90.0 MAX_MD_DEVS=256, MD_SB_DISKS=27
> md: Autodetecting RAID arrays.
> <...>
> scsi0 : sym53c8xx-1.7.3c-20010512
> scsi1 : sym53c8xx-1.7.3c-20010512
> blk: queue c3c57618, I/O limit 4095Mb (mask 0xffffffff)
>    Vendor: HP        Model: 36.4GB C 80-8C32  Rev:
>    Type:   Direct-Access                      ANSI SCSI revision: 02
> blk: queue c3c57818, I/O limit 4095Mb (mask 0xffffffff)
>    Vendor: HP 36.4G  Model: MAN3367MC         Rev: HP04
>    Type:   Direct-Access                      ANSI SCSI revision: 02
> <...>
> 
> I'm not too swift on filesystems and discs, so let me know if there is 
> more info you need & thanks
> 
> 
> On Tuesday, September 24, 2002, at 01:40  PM, Bradley W. Langhorst 
> wrote:
> 
> >
> > On Tue, 2002-09-24 at 15:57, John Coston wrote:
> >>   12:46pm  up 2 days, 17:14,  3 users,  load average: 20.24, 20.26, 
> >> 20.51
> >> 129 processes: 106 sleeping, 23 running, 0 zombie, 0 stopped
> >> CPU states: 36.1% user, 63.8% system,  0.0% nice,  0.0% idle
> >> Mem:  3229040K av, 3166372K used,   62668K free,       0K shrd,
> >
> > i have about 20 users on a 900Mhz machine with 100G of storage (only
> > 384M ram)
> >
> > i don't think it's ever been cpu bound as a result of samba activity.
> >
> > that 63.8% system seems out of whack...
> > what is the disk subsystem?
> >
> > brad
> >
> >
> 
> 
> 





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