Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Fri, Jun 22, 2012 at 02:38:07PM -0500, J.R. Lillard wrote: > 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 You want to increase your max-buffers. And have a look at the other hints on drbd performance tuning. Cheers, Lars > resync: used:0/61 hits:3274 misses:165 starving:0 dirty:0 > changed:165 > act_log: used:135/3833 hits:788561 misses:25007 starving:0 dirty:28 > changed:24979 > > 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) > >> > >> Regards, > >> Andreas > >> > >> -- > >> Need help with DRBD? > >> http://www.hastexo.com/now > >> > >> > > >> > -- > >> > 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 > >> http://lists.linbit.com/mailman/listinfo/drbd-user > >> > >> > > > > > > -- > > J.R. Lillard > > System / Network Admin > > Web Programmer > > Golden Heritage Foods > > 120 Santa Fe St. > > Hillsboro, KS 67063 > > > > > > > -- > 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 -- : Lars Ellenberg : LINBIT | Your Way to High Availability : DRBD/HA support and consulting http://www.linbit.com DRBD® and LINBIT® are registered trademarks of LINBIT, Austria. __ please don't Cc me, but send to list -- I'm subscribed