Hello,help,thank you!

could you tell me how to get the current size of cache?
not the max or config size.which I want is the dynamic status of size.
and how to get the last/bottomest entry of a database stored in a configured max size cache?
because i want to get and put the last entry into disk database(oracle) continuously when cache is full.
and how to set to let it won't dump into disk by bdb form automatically.
thank you!

Hi,
could you tell me how to get the current size of cache?not the max or config size.which I want is the dynamic status of size.>
EnvironmentStats.getCacheTotalBytes
and how to get the last/bottomest entry of a database stored in a configured max size cache?because i want to get and put the last entry into disk database(oracle) continuously when cache is full.
and how to set to let it won't dump into disk by bdb form automatically.>
I'm not sure I understand what you're asking. My best guess is that you want to know how many records you can insert without filling the cache. Is that right?
There is no way to predict this in advance with 100% accuracy, but the DbCacheSize utility will give you an approximate number.
If you want to insert records until the cache is full, the best approach is to insert records until eviction starts, and then stop inserting records. Eviction starts when EnvironmentStats.getNEvictPasses is greater than zero.
You can get EnvironmentStats with Environment.getStats.
--mark

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Message was edited by: zzziggy85

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