#include <db.h>

int
DB_ENV->txn_checkpoint(const DB_ENV *env,
    u_int32_t kbyte, u_int32_t min, u_int32_t flags);

If there has been any logging activity in the database environment since the last checkpoint, the DB_ENV->txn_checkpoint method flushes the underlying memory pool, writes a checkpoint record to the log, and then flushes the log.

The DB_ENV->txn_checkpoint method returns a non-zero error value on failure and 0 on success.

The DB_ENV->txn_checkpoint method is the underlying method used by the db_checkpoint utility. See the db_checkpoint utility source code for an example of using DB_ENV->txn_checkpoint in a IEEE/ANSI Std 1003.1 (POSIX) environment.

• The flags parameter must be set to 0 or the following value:
  DB_FORCE
  • Force a checkpoint record, even if there has been no activity since the last checkpoint.
  
  

• If the kbyte parameter is non-zero, a checkpoint will be done if more than kbyte kilobytes of log data have been written since the last checkpoint.

• If the min parameter is non-zero, a checkpoint will be done if more than min minutes have passed since the last checkpoint.

The DB_ENV->txn_checkpoint method may fail and return one of the following non-zero errors:

• An invalid flag value or parameter was specified.