On 06/30/2011 11:56 PM, Sašo Kiselkov wrote: > On 06/30/2011 01:33 PM, Jim Klimov wrote: >> 2011-06-30 15:22, Sašo Kiselkov пишет: >>> I tried increasing this >>>>> value to 2000 or 3000, but without an effect - prehaps I need to set it >>>>> at pool mount time or in /etc/system. Could somebody with more >>>>> knowledge >>>>> of these internals please chime in? >>>> >> >> And about this part - it was my understanding and experience >> (from SXCE) that these values can be set at run-time and are >> used as soon as set (or maybe in a few TXGs - but visibly in >> real-time). >> >> Also I've seen instant result from setting the TXG sync times >> on oi_148a with little loads (in my thread about trying to >> account for some 2Mb writes to my root pool) - this could be >> 2Mb/s or 0.2Mb/s (all in 2Mb bursts though) depending on TXG >> timeout currently set value. >> > > Hm, it appears I'll have to do some reboots and more extensive testing. > I tried tuning various settings and then returned everything back to the > defaults. Yet, now I can ramp the number of concurrent output streams to > ~170 instead of the original 95 (even then the pool still has capacity > left, I'm actually running out of CPU power). The txg commit occurs at > roughly every 15 (or so) seconds, which is what I wanted. Strange that > this occurs even after I returned everything to the defaults... I'll try > doing some more testing on this once I move the production deployment to > a different system and I'll have more time to experiment with this > machine. Anyways, thanks for the suggestions, it helped a lot. > > Regards, > -- > Saso
Just a follow correction: one parameter was indeed changed: zfs_write_limit_inflated. In the source it's set to zero, I've set it to 0x200000000. Regards, -- Saso _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
