I didn't see this show up on the list, so I'm trying again.
----
Been seeing this a bit lately on a server with 96GB ram where the zil is
limited to 48GB. Under heavy NFS load (caused by user running parallel
find/xargs/rm clean job), it sends the machine into desparation memory
and causes it to be unreachable for a while. (the server is 24 x SSD,
and internal I/O load is ok, but the many concurrent NFS requests cause
it to die, sometimes requiring a reset. usually it recovers in a few
minutes, but it becomes unservicible from memory shortage.
I have some mdb/kmastat/kmausers/memstat output.
here's the kmastat break down.
Total [hat_memload] 15.8M 5155240 0
Total [kmem_msb] 22.0G 987112603 0
Total [kmem_firewall] 271M 411704261 895
Total [kmem_va] 40.8G 22314937 0
Total [kmem_default] 31.8G 4275706645 619
Total [kmem_io_4P] 44.7M 26714639 0
Total [kmem_io_4G] 108K 908 0
Total [kmem_io_2G] 100K 68 0
Total [bp_map] 0 7251 0
Total [umem_np] 0 728 0
Total [zfs_file_data] 118M 93380 0
Total [zfs_file_data_buf] 19.4G 22030035 0
Total [segkp] 256K 6787 0
Total [ip_minor_arena_sa] 512 72304 0
Total [ip_minor_arena_la] 64 29350 0
Total [spdsock] 0 1 0
Total [namefs_inodes] 64 27 0
------------------------------ ----- --------- --------- ------
---------- -----
the kmausers is almost 1MB.
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