server lags out every 7-10 days, sometimes becoming unresponsive

[esarakaitis]

server lags out every 7-10 days, sometimes becoming unresponsive

15:00:21 up 7 days, 2:41, 0 users, load average: 0.37, 0.42, 0.39

Filesystem Size Used Avail Use% Mounted on
/dev/sda6 2.0G 433M 1.5G 24% /
/dev/sda1 145M 16M 122M 12% /boot
none 760M 0 760M 0% /dev/shm
/dev/sda2 14G 2.9G 11G 22% /home
/dev/sda7 981M 19M 913M 2% /tmp
/dev/sda3 9.6G 2.2G 6.9G 25% /usr
/dev/sda5 6.8G 635M 5.8G 10% /var

no out of control processes....

Tasks: 134 total, 1 running, 131 sleeping, 0 stopped, 2 zombie
Cpu0 : 1.6% us, 0.5% sy, 0.0% ni, 96.9% id, 0.9% wa, 0.0% hi, 0.0% si
Cpu1 : 0.6% us, 0.3% sy, 0.0% ni, 94.1% id, 4.9% wa, 0.0% hi, 0.0% si
Cpu2 : 0.9% us, 0.2% sy, 0.0% ni, 98.4% id, 0.5% wa, 0.0% hi, 0.0% si
Cpu3 : 0.7% us, 0.4% sy, 0.0% ni, 93.9% id, 5.0% wa, 0.0% hi, 0.0% si
Mem: 1554516k total, 1303812k used, 250704k free, 367052k buffers
Swap: 104380k total, 168k used, 104212k free, 551360k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
7020 root 16 0 3888 1680 2788 S 2.6 0.1 0:03.12 antirelayd
641 root 15 0 0 0 0 S 1.3 0.0 13:25.54 kjournald
9469 mailnull 15 0 9268 3108 6280 S 1.3 0.2 0:00.01 exim
1 root 16 0 1940 416 1316 S 0.0 0.0 0:11.18 init
2 root RT 0 0 0 0 S 0.0 0.0 0:01.16 migration/0
3 root 34 19 0 0 0 S 0.0 0.0 0:00.08 ksoftirqd/0
4 root RT 0 0 0 0 S 0.0 0.0 0:01.29 migration/1
5 root 34 19 0 0 0 S 0.0 0.0 0:00.05 ksoftirqd/1
6 root RT 0 0 0 0 S 0.0 0.0 0:01.25 migration/2
7 root 34 19 0 0 0 S 0.0 0.0 0:00.05 ksoftirqd/2
8 root RT 0 0 0 0 S 0.0 0.0 0:16.51 migration/3
9 root 34 19 0 0 0 S 0.0 0.0 0:00.05 ksoftirqd/3
10 root 5 -10 0 0 0 S 0.0 0.0 0:00.00 events/0
11 root 5 -10 0 0 0 S 0.0 0.0 0:00.00 events/1

[Aric1]

If that is what your server looks like when you notice it lagging, then I suggest you talk to your NOC and find out if they are doing any work. Try a traceroute, too.