Harisfazillah Jamel, 08 March 2010
Report For SCO 505 System Tuning
Report summary for SCO 505 System tuning. A job that I had done on 10th and 14th December 2004. Share this for reference to others. I will write detail about each items and compare it with Linux commands.
The system has been monitored on one day basis at approximately on 6 hours and below the finding:
a. Run the sar command to monitor memory utilization, CPU load and Hard disk cache and write buffer.
b. Checking the root file system / and found inadequate disk space for virtual disk buffer to spare for any spooling process like printing services.
c. Cheking the log files and log rotation as well as the cron (task scheduler) jobs.
d. Check the network LISTEN state to identify any unusable ports and services.
e. Check the backup on offline system and found the tape drive could not be read and suspected the tape drive malfunction and also likely the device may not perform fully functional on the task to write to the tape.
f. Prepare the backup for / and /etc and any configuration file for easy future recovery task.
Tuning and Improvement Done
1. System File Cleanup
- Null log files and spool file which are not necessary
/tmp and /var/tmp to be checked for any large unnecessry file that exhausted the / root directory.
- Stop non used services and remove from auto startup
- it is recorded that previous service from 31 open port and services has been reduce to 18 ports and services.
3. Kernel Tuning (NBUF)
- change from current default 6652K to 268288K
- reason for kernel tuning (increase the buffer cache) to the recommendation of the physical memory, that likely reported by SCO Unix for better performance.
- Recompile the kernel
4. Installed the monitoring Utility Using SCO Skunware 98 CD
- Installed top (to view and monitor active process in text mode)
- Installed the sarcheck to monitor hardware performance
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