Hi all... I am having serious problems on my server. I have ISPConfig updated. The server is a HP Proliant DL120 Xeon processor and 4GB of memory. I have 4 HD's from 1.5TB RAID (software) 1 +0. I've created a swap 16GB swap file. This machine is suddenly overloaded and presents the following scenario: Code: top - 14:19:18 up 52 days, 14:22, 2 users, load average: 88.37, 67.84, 33.85 Tasks: 572 total, 1 running, 571 sleeping, 0 stopped, 0 zombie Cpu(s): 0.1%us, 0.2%sy, 0.0%ni, 72.6%id, 26.8%wa, 0.0%hi, 0.3%si, 0.0%st Mem: 4049644k total, 3987108k used, 62536k free, 13604k buffers Swap: 16777212k total, 2724816k used, 14052396k free, 67724k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 361 root 20 0 0 0 0 S 1 0.0 302:07.98 md0_raid10 28316 mysql 20 0 592m 40m 0 S 1 1.0 2038:02 mysqld 30873 root 20 0 19680 1704 968 R 1 0.0 0:00.03 top 34 root 20 0 0 0 0 S 0 0.0 0:36.01 events/7 116 root 20 0 0 0 0 S 0 0.0 42:45.00 kondemand/0 122 root 20 0 0 0 0 S 0 0.0 37:19.31 kondemand/6 17106 www-data 20 0 272m 3036 368 S 0 0.1 0:07.60 apache2 30517 www-data 20 0 265m 3748 808 S 0 0.1 0:00.02 apache2 30559 www-data 20 0 264m 3648 1148 D 0 0.1 0:00.04 apache2 30613 www-data 20 0 269m 10m 2808 S 0 0.3 0:00.22 apache2 30794 root 20 0 16860 1428 908 D 0 0.0 0:00.04 couriertls 1 root 20 0 23752 452 100 S 0 0.0 0:24.44 init 2 root 20 0 0 0 0 S 0 0.0 0:00.00 kthreadd 3 root 20 0 0 0 0 S 0 0.0 0:25.48 ksoftirqd/0 4 root RT 0 0 0 0 S 0 0.0 0:14.89 migration/0 5 root RT 0 0 0 0 S 0 0.0 0:00.00 watchdog/0 6 root RT 0 0 0 0 S 0 0.0 0:05.37 migration/1 How can I do to fix it?? Thanks
The load is so hign because your raid is currently resyncing. The load will drop again when the raid is resynced, you can check the raid state with: cat /proc/mdstat This is issue not related to ispconfig.
Ok, but, what can I do to prevent the system becoming overloaded? It's possible? The result of command: Code: root@turbo:~# cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md0 : active raid10 sdb1[1] sdc1[2] sda1[0] sdd1[3] 2930274176 blocks 64K chunks 2 near-copies [4/4] [UUUU] unused devices: <none>
After a raiud error or the initial install, the raid has to resync itself. Thats normal and can not be prevented on a software raid. Using a hardware raid controller might be an option. But normally such a resync does not happen that often (on my servers I have this once every few years).
Ok, now I changed my swap. I put 4GB of swap. The processing was high again. Look at it now: Code: root@turbo:~# cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md0 : active raid10 sdb1[1] sdc1[2] sda1[0] sdd1[3] 2930274176 blocks 64K chunks 2 near-copies [4/4] [UUUU] unused devices: <none> root@turbo:~# free -m total used free shared buffers cached Mem: 3954 3594 360 0 339 1527 -/+ buffers/cache: 1727 2226 Swap: 8191 127 8064 root@turbo:~# vmstat procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 0 1 130716 330504 350244 1582936 0 0 18 76 1 15 2 1 93 4
No, it was just a resync after a initial install or a sync failure as I explained above. It was not a issue that happens regularily.
