### DbEnv::txn_checkpoint

`

###

    #include <db_cxx.h>

    int
    DbEnv::txn_checkpoint(u_int32_t kbyte, u_int32_t min, u_int32_t flags) const;

### Description: DbEnv::txn_checkpoint

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

The DbEnv::txn_checkpoint method either returns a non-zero error value or throws an exception that encapsulates a non-zero error value on failure, and returns 0 on success.

### Parameters

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

### Errors

The DbEnv::txn_checkpoint method may fail and throw DbException, encapsulating one of the following non-zero errors, or return one of the following non-zero errors:

EINVAL
  An invalid flag value or parameter was specified.

### Class

DbEnv, DbTxn

### See Also

Transaction Subsystem and Related Methods`

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