Thank you both for help. What Richar Hipp wrote is truth and something what I also saw using valgrind - memory allocation (overall consumption) of around 300 - 500 kB.
To answer at least some one Bob's question from first e-mail, I'm trying to open in memory database (:memory:), so size of database should be almost nothing. By checking smaps, I can see big allocation there. It seems that all your assumptions are correct, memory doesn't seem to be used. 7fdd28021000-7fdd2c000000 ---p 00000000 00:00 0 Size: 65404 kB Rss: 0 kB Pss: 0 kB Shared_Clean: 0 kB Shared_Dirty: 0 kB Private_Clean: 0 kB Private_Dirty: 0 kB Referenced: 0 kB Anonymous: 0 kB AnonHugePages: 0 kB Shared_Hugetlb: 0 kB Private_Hugetlb: 0 kB Swap: 0 kB SwapPss: 0 kB KernelPageSize: 4 kB MMUPageSize: 4 kB Locked: 0 kB VmFlags: mr mw me nr sd But still, I would like to solve this somehow, could you please suggest me some point, where to start ? Are there any possible compilation options, to limit this allocation ? It would be completely fine for me, to allocate like 1MB or so, but this is way too much, although not used. Thank you for your help, Best Regards, Martin 2018-07-13 17:31 GMT+02:00 Bob Friesenhahn <bfrie...@simple.dallas.tx.us>: > On Fri, 13 Jul 2018, Richard Hipp wrote: > >> >> The OP's test program (with a bug fix, various whitespace changes, and >> the addition of a call to sqlite3_memory_used()) is show below. >> sqlite3_memory_used() reports no difference in memory allocation. >> > > The usage is uninitialized/unmodified virtual memory which could be from a > heap allocation (with no subsequent writes to it) or due to memory mapping > something such as a file. The cause of the the usage may be deduced by > inspecting the /proc/[pid]/smaps content on a Linux system where '[pid]' is > the process id of the program. > > Bob > -- > Bob Friesenhahn > bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ > GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ > _______________________________________________ > sqlite-users mailing list > sqlite-users@mailinglists.sqlite.org > http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users > _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users
