Our Unix computer Info:
Model: Alpha Server 1200 5/533 DA-54KHC-DA
CPU: 533 MHz
Cache: 4 MB
RAM: 2507 MB
Hard Drive: More than 100 GB
Operating System: Digital Unix 4.0 E
I found our Unix computer is delayed a few second to display from the
screen.
The delayed display is happened every 30 second and lasts about 8-9 second.
I think the reason is because an update process.
The update process executes a sync system call every 30 seconds.
>From the Top program I found when the update process is running it take
96.9% of CPU.
The Top program displayed as below:
load averages: 3.43, 1.10, 0.95
11:47:35
87 processes: 5 running, 5 sleeping, 77 idle
CPU states: 0.0% user, 0.0% nice, 85.8% system, 14.0% idle
Memory: Real: 241M/2507M act/tot Virtual: 2046M use/tot Free: 2031M
PID USERNAME PRI NICE SIZE RES STATE TIME CPU COMMAND
19649 root 53 0 1704K 90K run 26:02 96.90% update
499 root 42 0 6256K 2473K run 5:55 0.00% insightd
456 root 44 0 2376K 163K run 1:26 0.00% svrSystem_mib
20318 zuh 44 0 2616K 401K run 0:00 0.00% top
444 root 44 0 1872K 163K sleep 2:18 0.00% snmpd
460 root 44 0 2944K 663K sleep 0:02 0.00% cpq_mibs
455 root 44 0 2368K 155K sleep 0:01 0.00% svrMgt_mib
873 root 44 0 2944K 475K sleep 0:00 0.00% httpd
19975 root 44 0 4192K 409K sleep 0:00 0.00% sshd2
Every 30-second delaying 8-9 second is quite inconvenient.
Question:
1. Can I kill this update process and never run it again?
2. Can I change the 30-second to 5 or 10 minutes for the update
process executes a sync system call? How to change it?
3. Why does the update process take so many percentage usages
on CPU? Even it doesn't have many and big jobs on this Unix computer.
4. Can I limit the update process percentage usage on CPU?
5. Any other method to fix this problem?
Thank you!
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Hongya Zu
Research Information Service
Children's Research Institute
700 Children's Drive
Columbus, OH 43205
Phone: (614) 722-2914
Fax: (614) 722-2716
Email: zuh_at_pediatrics.ohio-state.edu
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Received on Wed Jan 16 2002 - 17:58:20 NZDT