# mco_HA_commit_window

This function is called by the master to force replicas to confirm a transaction package.

### For an overview see page HA Applications

### Prototype

        MCO_RET	mco_HA_commit_window(	mco_db_h db )

### Arguments

db | Connection handle to master database.

### Description

This function is called by the master to force replicas to confirm a transaction package (window). It is useful when the transaction window size is more than 1, i.e. when multiple transactions are buffered to be committed together (see `mco_HA_set_trans_window_size()`)

### Return Codes

MCO_S_OK | Successful.
Other error codes: | If not successful, this fuction returns the error code that occurred in `mco_trans_commit()`