Christian Smith wrote:
Because my project will run in an embedded environment, so I have to
take care of the RAM consumption. I have went through the mail list,
but not found the description of minimum RAM usage.
Could anyone tell me how much RAM is needed to run SQLite in an
embedded environment?
That depends. SQLite can have functionality conditionally compiled
out, reducing it's size. The front page (http://www.sqlite.org/)
proclaims:
"Small code footprint: less than 250KiB fully configured or less than
150KiB with optional features omitted."
YMMV. Your best bet is to choose the features you don't need, compile
up your target library, and measure the code size yourself.
The original post asked about RAM requirements in an embedded
environment. In embedded applications the code is normally stored in,
and executed from, ROM of FLASH not RAM. The RAM requirements he is
looking for are the stack space, heap space, and static variable storage
requirements of SQLite when it is executing.
I haven't seen any details on these requirements anywhere in the
documentation, but I could have missed it.
The stack and heap space requirements will depend upon the complexity of
the queries you are executing. I would guess that the largest stack
requirements would occur while compiling your queries, and the maximum
heap requirements would occur while executing them (for things like
temporary tables used by IN clauses etc). The static variable
requirements should be fixed when your application is linked, and may
depend upon which features you have compiled in or omitted.
I think you will probably have to determine these values experimentally.
HTH
Dennis Cote
