topic Problems with Extended File Cache (XFC) in Operating System - OpenVMS

Problems with Extended File Cache (XFC)

Roger Grauwmeijer — Wed, 25 Jun 2003 20:20:51 GMT

We have recently experienced problems whereby files with the nocache attribute are still being loaded into the cache but being bypassed once loaded. As the files are Oracle RDB database files, the cache quickly gets fully consumed and memory resource becomes critical.

We have overcome the problem by mounting our database volumes nocache instead but would like to know why this problem was occuring and whether anyone else has experienced to problem.

Re: Problems with Extended File Cache (XFC)

Martin P.J. Zinser — Wed, 25 Jun 2003 20:29:54 GMT

Which OpenVMS version do you use? Essentially
XFC had various serious problems before 7.3-1

Re: Problems with Extended File Cache (XFC)

Roger Grauwmeijer — Wed, 25 Jun 2003 21:08:37 GMT

Re: Problems with Extended File Cache (XFC)

Martin P.J. Zinser — Wed, 25 Jun 2003 21:30:09 GMT

There is an XFC 100 patch out for 7.3-1. Not sure if that fixes your problem, but support will certainly ask you to install it :-)

Also you might want to have a look at SYS 300

Greetings, Martin