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Debian becomes slow! Debian becomes slow!
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  #1  
Old 09-01-2008
mjdousti's Avatar
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Join Date: Jan 2007
Posts: 48
Debian becomes slow!
Hi all,
I've a debian 4 etch machine which runs on a HP Proliant G5 server. My server became too slow yesterday. I restarted the it and also try to run in Run Level 1 but nothing changed. This is the status of my debian box:

Code:
top - 12:33:11 up 34 min,  3 users,  load average: 0.00, 0.03, 0.21
Tasks: 158 total,   1 running, 157 sleeping,   0 stopped,   0 zombie
Cpu(s):  0.7%us,  0.2%sy,  0.0%ni, 95.9%id,  3.2%wa,  0.0%hi,  0.0%si,  0.0%st
Mem:   4149764k total,   992552k used,  3157212k free,    51816k buffers
Swap:  5855684k total,        0k used,  5855684k free,   818760k cached
Also I ran the rkhunter and chkrootkit but they found no rootkit in the server. The strang thing is some commands are fast like "cd" but some of them are slow like "ls -aHl" in some places for example in the /root and also the login process takes a lot of time to be done.

Does anyone have any suggestion?

Thanks in advance.
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  #2  
Old 09-01-2008
era era is offline
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Join Date: Mar 2008
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Posts: 3,650
Are there lots of files (perhaps hidden) in the directories where it's slow? The CPU load doesn't seem to explain anything so it's probably I/O congestion of one kind or another. (The 3.2% waiting might or might not seem high; on my fairly loaded system, I'm seeing waiting percentages between 0 and 1, more towards 0.)
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Old 09-01-2008
mjdousti's Avatar
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Join Date: Jan 2007
Posts: 48
The result of iostat is here:
Code:
myserver:/etc# iostat
Linux 2.6.18-6-686-bigmem (myserver)       09/01/2008

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
           0.61    0.00    0.23    6.88    0.00   92.28

Device:            tps   Blk_read/s   Blk_wrtn/s   Blk_read   Blk_wrtn
cciss/c0d0      146.01      1632.76       263.24    1008194     162544
cciss/c0d1        0.10         1.49         0.00        922          0
As you said my iowait is high. What can I do to decrease it?
But I think this is not the only problem of the server. I've another sever with iowait about 3 but it runs fast and without any poblem.
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