Healthy cache memory
Novell Cool Solutions: Question & Answer
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Q:
I have a question about Cache Memory Percent. Does the Total Cache Buffers/Original Cache Buffers = 40% or more still hold true for NW 6.5? We don't have server memory problems to a really noticeable degree, but I'd like to optimize my system. The servers all have at least a gig of RAM, but there's a lot of student traffic, so I just wanted to know what to look for in 6.5 since it's the first time I've worked with it.
A:
Well, 40% for servers isn't as bad as it used to be. The remaining memory is probably in use by the VM cache pool (check miscellaneous memory in monitor.nlm | system resources). Because 90%+ NLMs allocate memory from the VM pool, having 40% remaining for file system caching is actually pretty good.
You should also pay some attention to LRU Sitting Time. That's a good measure for the server if there are traditional (filesys.nlm) volumes in use. If there is a combination of traditional and NSS, then that one statistic isn't probably enough in and of itself.
The real test is to see if the server operates correctly.
Anyone have any tips/suggestions/recommendations for cache memory guidelines? Let us know.
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