On 06/29/2011 11:37 AM, Proskurin Kirill wrote: > On 06/27/2011 05:21 PM, Hubert Kario wrote: >> On Monday 27 of June 2011 11:04:06 Proskurin Kirill wrote: >>> Hello all. >>> >>> What we have: >>> SL6 - kernel 2.6.32-131.2.1.el6.x86_64 >>> btrfs on mdadm RAID5 with 8 HDD - 27T partition. >>> >>> I see this at top: >>> 1182 root 20 0 0 0 0 R 100.0 0.0 16:39.73 >>> [btrfs-delalloc-] >>> >>> And LA is grow. What is this and how can I fix it? >> >> delalloc is a delayed allocation kernel thread -- it probably means >> something >> is writing large amounts of data to the file system >> >> 2.6.32 is *old* as far as btrfs is concerned, there have been many >> bugs fixed >> and performance improvements since > > Ok - I upgrade to 2.6.39-2 but it is seems to all things get worse. > Now I see [btrfs-transacti] & btrfs-endio-wri] 80-100% all the time and > io performance looks like lower then before. > > Our scribe daemon in state D most of the time with half of a normal > load. Only kernel was changed. > > Any performance tune recommendation? >
Can you get sysrq+w while this problem is happening so we can see whats going on? Thanks, Josef -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
