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Very large lookup cache problems

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MrSpaceboy

Programmer
Dec 23, 2004
1
US
Hi, I have a mapping that loads about 2.5 million records.

The problem is the cache. I have 2 very large caches. The index caches are actually the biggest, and both of these are around 600MB.

I can't set the cache size to 600MB or it bombs with "out of virtual memory".

While I run the mappings, I notice that it seems that no matter what size I make the cache -- the same amount writes to disk.

This is making me wonder -- is the cache and "all or nothing" thing? In other words, if the whole cache does not fit in the allocated memory -- the entire file gets written to disk?

I'm open to suggestions or thoughts. Thanks in advance.
 
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