Imam od pre par dana gadan problem sa performansama na serveru na kome se vrti Redhat Linux 3 (kernel 2.4.21-4.ELsmp). Sve je bas sporo i svi servisi se izvrsavaju otezano...
Izlaz top komande kaze da je procesor najvise vremena gubi na cekanju na upis na hard disk, tj. iowait je vecim delom vremena blizu 100%
12:03:21 up 18 min, 2 users, load average: 10.90, 10.61, 6.94
106 processes: 105 sleeping, 1 running, 0 zombie, 0 stopped
CPU states: cpu user nice system irq softirq iowait idle
total 0.4% 0.0% 0.2% 0.0% 0.0% 99.2% 0.0%
cpu00 0.1% 0.0% 0.0% 0.0% 0.0% 99.8% 0.0%
cpu01 0.7% 0.0% 0.5% 0.0% 0.0% 98.6% 0.0%
Mem: 1028472k av, 264152k used, 764320k free, 0k shrd, 13744k buff
188940k active, 13848k inactive
Swap: 2096472k av, 0k used, 2096472k free 78164k cached
PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME CPU COMMAND
3578 spamd 15 0 20932 20M 2288 S 0.1 2.0 0:00 1 spamd child
3631 nobody 15 0 26380 25M 1716 S 0.1 2.5 0:03 0 (squid)
1 root 15 0 504 504 448 S 0.0 0.0 0:04 0 init
2 root RT 0 0 0 0 SW 0.0 0.0 0:00 0 migration/0
3 root RT 0 0 0 0 SW 0.0 0.0 0:00 1 migration/1
4 root 15 0 0 0 0 SW 0.0 0.0 0:00 0 keventd
5 root 34 19 0 0 0 SWN 0.0 0.0 0:00 0 ksoftirqd/0
6 root 34 19 0 0 0 SWN 0.0 0.0 0:00 1 ksoftirqd/1
9 root 25 0 0 0 0 SW 0.0 0.0 0:00 1 bdflush
7 root 15 0 0 0 0 SW 0.0 0.0 0:00 0 kswapd
8 root 15 0 0 0 0 SW 0.0 0.0 0:00 0 kscand
10 root 15 0 0 0 0 SW 0.0 0.0 0:00 0 kupdated
11 root 25 0 0 0 0 SW 0.0 0.0 0:00 1 mdrecoveryd
17 root 15 0 0 0 0 DW 0.0 0.0 0:00 0 aarich watchdog
18 root 25 0 0 0 0 SW 0.0 0.0 0:00 1 scsi_eh_0
21 root 15 0 0 0 0 DW 0.0 0.0 0:00 0 kjournald
77 root 21 0 0 0 0 SW 0.0 0.0 0:00 0 khubd
2983 root 15 0 0 0 0 SW 0.0 0.0 0:00 0 kjournald
3292 root 15 0 572 572 492 D 0.0 0.0 0:00 0 syslogd -m 0
3296 root 15 0 452 452 392 S 0.0 0.0 0:00 1 klogd -x
3306 root 15 0 440 440 384 S 0.0 0.0 0:00 0 irqbalance
3421 root 15 0 1328 1328 1116 S 0.0 0.1 0:00 0 /usr/sbin/sshd
3435 root 24 0 884 884 768 S 0.0 0.0 0:00 0 xinetd -stayalive -pidfile /var/run/xinetd.pid
3466 root 15 0 616 616 548 S 0.0 0.0 0:00 0 crond
3496 xfs 15 0 3180 3180 820 S 0.0 0.3 0:00 1 xfs -droppriv -daemon
3507 daemon 15 0 556 556 492 S 0.0 0.0 0:00 1 /usr/sbin/atd
3516 root 15 0 1572 1572 1308 S 0.0 0.1 0:00 0 sshd: root@pts/0
3519 spamd 16 0 19608 19M 2144 S 0.0 1.9 0:00 0 /usr/bin/spamd -x -u spamd -H /home/spamd -d
3521 root 15 0 1352 1352 1148 S 0.0 0.1 0:00 0 -bash
3570 qscand 15 0 15696 15M 1004 S 0.0 1.5 0:00 1 /usr/sbin/clamd -c /etc/clamd.conf
3576 spamd 15 0 20940 20M 2284 D 0.0 2.0 0:00 1 spamd child
3577 spamd 15 0 20788 20M 2260 S 0.0 2.0 0:00 0 spamd child
3579 spamd 15 0 20704 20M 2252 S 0.0 2.0 0:00 0 spamd child
... ostatak isecen...
Da li neko ima ideju gde bih mogao da trazim problem? Server u ovoj konfiguraciji radi neprekidno 2 godine, pri cemu nista od hardvera nije menjano, a sto se tice softvera, takodje nista kljucno nije dirano - OS, kernel je isti...
Pozdrav
Zoran