Messages in this thread | | | Date | Sat, 11 Jun 2005 19:00:52 -0400 (EDT) | From | Gaspar Bakos <> | Subject | Re: kswapd causing giant load |
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Hi, Rik,
RE: > Looks like your system is NUMA, meaning that the system > memory is divided in half, and the threshold at which a > memory dirtying process is throttled might be higher than > the amount of memory available in the zone. > > Can you reproduce this problem if you boot with "numa=off" > or if you "echo 20 > /proc/sys/vm/dirty_ratio" ?
After the "echo 20 > /proc/sys/vm/dirty_ratio", the system load still goes up to aboe 3.0, with kswapd0 and kswapd1 (plus cp on top of the list). By the way, i am using cp between to SATA disks, this time, with the 3ware arrays not involved in the process at all.
--------------- top - 18:50:20 up 7 days, 6:15, 1 user, load average: 3.15, 2.15, 1.14 Tasks: 91 total, 1 running, 89 sleeping, 1 stopped, 0 zombie Cpu(s): 0.2% us, 11.7% sy, 0.0% ni, 1.5% id, 84.0% wa, 0.8% hi, 1.8% si Mem: 4011484k total, 3987444k used, 24040k free, 0k buffers Swap: 7823576k total, 22176k used, 7801400k free, 3823104k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 7521 root 18 0 44420 636 548 D 17.3 0.0 0:34.02 cp 174 root 15 0 0 0 0 S 3.0 0.0 20:18.99 kswapd1 175 root 15 0 0 0 0 S 2.3 0.0 33:05.12 kswapd0 7526 root 15 0 0 0 0 D 1.0 0.0 0:00.71 pdflush ----------------
2.6.11-1.14_FC3smp #1 SMP Thu Apr 7 19:36:23 EDT 2005 x86_64 x86_64 x86_64 GNU/Linux
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