Yaniv Aknin wrote: > When volumes approach 90% usage, and under medium/light load (zpool iostat > reports 50mb/s and 750iops reads), some creat64 system calls take over 50 > seconds to complete (observed with 'truss -D touch'). When doing manual > tests, I've seen similar times on unlink() calls (truss -D rm).
If it's only file creation that's slow, it's possible that you're hitting 6544140 (fixed in snv_68). If this is the case then you will see high system time from your touch process, and a high ratio of calls to dnode_hold_impl() to dmu_object_alloc(), which you can examine with dtrace. If that isn't it, then try getting some stack traces (of the kernel stacks) when it's taking a long time. Again, dtrace is your friend here. --matt _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
