SQLITE_DBCONFIG_LOOKASIDE

This option takes three additional arguments that determine the lookaside memory allocator configuration for the database connection. The first argument (the third parameter to sqlite3_db_config() is a pointer to a memory buffer to use for lookaside memory. The first argument after the SQLITE_DBCONFIG_LOOKASIDE verb may be NULL in which case SQLite will allocate the lookaside buffer itself using sqlite3_malloc(). The second argument is the size of each lookaside buffer slot. The third argument is the number of slots. The size of the buffer in the first argument must be greater than or equal to the product of the second and third arguments. The buffer must be aligned to an 8-byte boundary. If the second argument to SQLITE_DBCONFIG_LOOKASIDE is not a multiple of 8, it is internally rounded down to the next smaller multiple of 8. The lookaside memory configuration for a database connection can only be changed when that connection is not currently using lookaside memory, or in other words when the "current value" returned by sqlite3_db_status(D,SQLITE_DBSTATUS_LOOKASIDE_USED,...) is zero. Any attempt to change the lookaside memory configuration when lookaside memory is in use leaves the configuration unchanged and returns SQLITE_BUSY.

Additional sqlite3_db_config() arguments: void* int int