The following table shows how to estimate the size of a checkpoint dump file.

Table H-7 Size of a checkpoint dump file

Item	Size of checkpoint dump file (Unit: bytes)
MCF service	( Sz1 / 4096 + 3) x 4096
Transaction journal service	( Sz2 / 4096 + 3) x 4096

Legend:

: Decimals are rounded up to a whole number.

Sz2: (640 x (rm count + 1) + 64 x Br) x Tr

Cn: Number of logical terminals with serial numbers specified in the -n option of the mcfmcomn definition command in the MCF manager definition

Pn: Number of physical files specified in the message queue service definition

Pr: Number of records specified in the -n option of the queinit command

Br: Maximum number of connection branches per transaction specified in the trn_max_subordinate_count operand in the transaction service definition

rm count: Number of resource managers (only RMs of OpenTP1)

Tr: Number of transaction branches specified in the trn_tran_process_count operand in the transaction service definition

Note that archive journal nodes do not require checkpoint dump files.

For details about the size of a checkpoint dump file used by TP1/Message Queue, see the manual OpenTP1 TP1/Message Queue User's Guide or the Release Note.