[DRBD-user] Protocol A Pending
jlillard at ghfllc.com
Fri Jun 22 21:38:07 CEST 2012
Witnessed another bandwidth spike that slowed my stacked layer down.
10: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate A r-----
ns:192538032 nr:0 dw:599650316 dr:1701817080 al:4481613 bm:43214 lo:1
pe:2050 ua:0 ap:2049 ep:1 wo:f oos:0
resync: used:0/61 hits:3274 misses:165 starving:0 dirty:0
act_log: used:135/3833 hits:788561 misses:25007 starving:0 dirty:28
On Fri, Jun 22, 2012 at 8:24 AM, J.R. Lillard <jlillard at ghfllc.com> wrote:
> My starving count was pretty high. I maxed out my al-extents and will see
> if that helps. Thanks.
> On Fri, Jun 22, 2012 at 4:22 AM, Andreas Kurz <andreas at hastexo.com> wrote:
>> On 06/20/2012 11:51 PM, J.R. Lillard wrote:
>> > I have a lower-level setup on Protocol C and a stacked layer of Protocol
>> > A going through Proxy over a WAN. There are times when my disk activity
>> > spikes causing the Proxy buffers to fill up a bit. While this is
>> > happening the Pending count on my stacked resources goes up and causes
>> > my access to those resources to slow down. Is this normal? I thought
>> > with Protocol A as soon as my local write was finished things would
>> > continue.
>> You checked that you are not running out of activity log extents for the
>> stacked resource?
>> Do an: echo 1 >/sys/module/drbd/parameters/proc_details
>> ... and have a look at "starving" counter in /proc/drbd ... should
>> ideally be 0 and definitely not increasing regularly. If it does,
>> increase the al-extents value for the stacked resource (max is 3833 in
>> drbd 8.3 ... IIRC)
>> Need help with DRBD?
>> > --
>> > J.R. Lillard
>> > System / Network Admin
>> > Web Programmer
>> > Golden Heritage Foods
>> > 120 Santa Fe St.
>> > Hillsboro, KS 67063
>> > _______________________________________________
>> > drbd-user mailing list
>> > drbd-user at lists.linbit.com
>> > http://lists.linbit.com/mailman/listinfo/drbd-user
>> drbd-user mailing list
>> drbd-user at lists.linbit.com
> J.R. Lillard
> System / Network Admin
> Web Programmer
> Golden Heritage Foods
> 120 Santa Fe St.
> Hillsboro, KS 67063
System / Network Admin
Golden Heritage Foods
120 Santa Fe St.
Hillsboro, KS 67063
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