APLawrence.com -  Resources for Unix and Linux Systems, Bloggers and the self-employed

Unix (3.2v4.2) and ODT FAQ


Some material is very old and may be incorrect today

© December 2003 (various)

This article is from a FAQ concerning SCO operating systems. While some of the information may be applicable to any OS, or any Unix or Linux OS, it may be specific to SCO Xenix, Open This is an old article about SCO Unix and is only left here for historical purposes. There is lots of Linux, Mac OS X and general Unix info elsewhere on this site: Search this site is the best way to find anything.

My older SCO Unix system is slow or hangs when sizing memory

The OS tries to flush the cache before sizing memory. On some systems, this may cause problems including painfully slow memory sizing. For Unix 3.2v4.2 and related systems, try adding the cache=/d option to your boot string. Try it out manually first, using defbootstr cache=/d at the Boot: prompt; if that works, add it to /etc/default/boot.

If you still run into problems, you may need to compare the memory map with and without cache. Boot with the cache=/d prompt options and, when the prompt comes up, type v to see the memory map found with the cache disabled. Then boot using cache=/e prompt and, again, type v at the prompt to see the memory map with the cache enabled. If they differ, it is not safe to size memory with cache disabled, and you will have to suffer with slow boot times (it will not affect performance once the system is rebooted).


If you found something useful today, please consider a small donation.



Got something to add? Send me email.





(OLDER)    <- More Stuff -> (NEWER)    (NEWEST)   

Printer Friendly Version

->
-> My system is slow or hangs when sizing memory (SCO Unix)


Inexpensive and informative Apple related e-books:

El Capitan: A Take Control Crash Course

Take Control of IOS 11

Take Control of High Sierra

Photos: A Take Control Crash Course

Take Control of Pages






Printer Friendly Version

Have you tried Searching this site?

This is a Unix/Linux resource website. It contains technical articles about Unix, Linux and general computing related subjects, opinion, news, help files, how-to's, tutorials and more.

Contact us


Printer Friendly Version





By understanding a machine-oriented language, the programmer will tend to use a much more efficient method; it is much closer to reality. (Donald Knuth)




Linux posts

Troubleshooting posts


This post tagged:

FAQ

Memory

Performance

SCO_OSR5



Unix/Linux Consultants

Skills Tests

Unix/Linux Book Reviews

My Unix/Linux Troubleshooting Book

This site runs on Linode