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Old 04-06-2004, 03:20 PM   #1
kfiralfia
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load average approaching 20


I'm a linux newbie who is in charge of a dedicated server running RedHat Linux 7.3.

This server hosts one site as well as an online forum that gets a lot of traffic. This forum uses phpBB2 software and is running MySQL 4.0.18.

My server is seeing some crazy load averages that are causing my server to freeze up on an hourly basis. Since I am a newbie, I am having a difficult time pinpointing where the root of the problem lies.

Using the top command, I see that the cpu% utilization hardly ever breaks 10%, but I do notice that kscand (I believe this process is for memory swapping) is constantly topping the list:

PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME COMMAND
6 root 10 0 0 0 0 SW 0.5 0.0 57:16 kscand

I believe this might have something to do with the mysql forum, which is fairly popular and sees a lot of traffic.

[edited: Please don't use our forums to classify pay for hire jobs. That is not the intention of this site.]

Last edited by trickykid; 04-06-2004 at 03:29 PM.
 
Old 04-09-2004, 05:11 PM   #2
RobertP
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vmstat 10 will show swaping activity.
Top or free should show memory usage. It sounds like you are short of memory. You should have enough real RAM to reduce swapping to 0 for snappy service. If you are swapping and doing db stuff, you have a real problem. You may hve to multiply your disc storage bandwidth with RAID 1.

There was a bug reported like yours:
RH7.3 bug

An upgrade fixed it.
 
Old 04-15-2004, 01:58 PM   #3
ugge
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It took me a couple of years before anyone could tell me what the number in the load average stand for.

The average load shows the average number of qued processes wait for execution.
The queing of proecesses while the processor work load i s low indicates there are trouble elsewhere. This can be heavy I/O trafic to the disks or, as I have experienced sometime, name resolve issues bringing the execution to a halt.
 
Old 04-15-2004, 04:37 PM   #4
WeNdeL
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Quote:
Originally posted by ugge
It took me a couple of years before anyone could tell me what the number in the load average stand for.

The average load shows the average number of qued processes wait for execution.
The queing of proecesses while the processor work load i s low indicates there are trouble elsewhere. This can be heavy I/O trafic to the disks or, as I have experienced sometime, name resolve issues bringing the execution to a halt.
took me a while to unearth the load average mystery as well...

good post man...
 
Old 04-15-2004, 05:29 PM   #5
ugge
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Thanks!
 
Old 09-29-2004, 10:35 AM   #6
british_76
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Quote:
Originally posted by ugge
It took me a couple of years before anyone could tell me what the number in the load average stand for.
thx .. you did me a great favour explaining this "magic" load-thing!
 
  


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