Currently on
commit 7cf96da3ec7ca225acf4f284b0e904a1f5f98821
Author: Tsutomu Itoh <t-itoh@xxxxxxxxxxxxxx>
Date: Mon Apr 25 19:43:53 2011 -0400
Btrfs: cleanup error handling in inode.c
merged into 2.6.38.4
I'm on a btrfs filesystem that has been used for some time. Let's say nine
months. Very recently I noticed performance getting worse and worse.
Most of the time it feels as if the system is just busy with iowait.
Write and read performance during random access is mostly around 2MB/s,
sometimes 1MB/s or slower. It's better for big files which can be read with about
6-9MB/s. The disk is a reasonably recent SATA disk (WDC_WD3200BEVT) so 30MB/s
or 40MB/s linear reading should not be a problem.
rootfs 291G 242G 35G 88% /
I tried btrfs filesystem defragment -v / but did not notice any improvement
after that.
Is this a known phenomenon? :-)
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