sqlite3_status, sqlite3_status64
  —
SQLite Runtime Status
int
sqlite3_status(int op,
  int *pCurrent, int *pHighwater,
  int resetFlag);
int
  
  sqlite3_status64(int op,
    sqlite3_int64 *pCurrent, sqlite3_int64
    *pHighwater, int resetFlag );
These interfaces are used to retrieve runtime status information about the
  performance of SQLite, and optionally to reset various highwater marks. The
  first argument is an integer code for the specific parameter to measure.
  Recognized integer codes are of the form SQLITE_STATUS_.... The current value
  of the parameter is returned into *pCurrent. The highest recorded value is
  returned in *pHighwater. If the resetFlag is true, then the highest record
  value is reset after *pHighwater is written. Some parameters do not record the
  highest value. For those parameters nothing is written into *pHighwater and
  the resetFlag is ignored. Other parameters record only the highwater mark and
  not the current value. For these latter parameters nothing is written into
  *pCurrent.
The sqlite3_status() and sqlite3_status64() routines return
    SQLITE_OK on success and a non-zero error code on failure.
If either the current value or the highwater mark is too large to
    be represented by a 32-bit integer, then the values returned by
    sqlite3_status() are undefined.