We are using sqlite in a low memory environment and as such have been using
the MEMSYS5 memory allocator. This has been working great to confine our
memory usage to the buffer that gets passed during start time. I have
recently run into some strange results while doing a step to insert a blob
into the database. If I set my cache size, using the  pragma, to 1500 then
the step fails with SQLITE_NOMEM, but if I do this same process and decrease
the cache size to 1000 then the step succeeds. This might sound like a easy
problem to fix in that my page cache is taking up the memory that the step
needs to complete the insert, but if I check the memory usage by calling
sqlite3_memory_used(), in both situations I have plenty of memory available
to complete the transfer. If anyone could shed some light on this issue I
would appreciate it.

 

Robert Read

Lead Software Engineer

Saltillo Corporation

 

 

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