Set the size of the cache does not work (to the great usefulness of RAM)

Hello
I posted this question in another forum, but they told me it would be better to aks that here:
I m read in a csv table and put in a primary database (DB_QUEUE)
and several secondary databases (DB_BTREE). I m using the Berkeley DB 4.7
for with C++. For the primary database, I let the standart for the secondary cache size
databases that I want to use 16 MB:

unsigned long cache_byte = (1024 * 1024 * 16);
s [a]-> set_cachesize(0,cache_byte,1)

dry [*] are the secondary databases
and the size of the cache is set before you open databases.
The problem is when I run the program it allocates more memory.
but it should just use a little bit more than once 16 MB.
Can someone help me?

You can open all databases in a unique environment, with just a cache? Happens usually better, because Berkeley DB can share the cache based on access patterns.

That said, an increase in size of the memory can be caused by a leak of any where in the application - it may have nothing to do with the cache of Berkeley DB. Have all of the tools that could help track where the memory is allocated? If you're on Linux, valgrind (http://valgrind.org) is great for this sort of thing.

Kind regards
Michael Cahill, Oracle Berkeley DB.

Tags: Database

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