Nonstop Database, HiRDB Version 9 Installation and Design Guide

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17.2 Determining the size of synchronization point dump files

Organization of this section
(1) Determining the size of a synchronization point dump file
(2) Determining the number of records in a synchronization point dump file

(1) Determining the size of a synchronization point dump file

The following formula is used to determine the size of a synchronization point dump file.

Formula
Size of synchronization point dump file (bytes)
= MAX(12, number of records in synchronization point dump file)#1 [Figure] 4,096#2

#1: See (2) as follows; the obtained value is specified in the -n option of the pdloginit command. If the obtained value is less than 12, specify 12 for the -n option of the pdloginit command.

#2: This is the record length of a synchronization point dump file.

(2) Determining the number of records in a synchronization point dump file

Condition Formula for determining the number of records
HiRDB single server configuration [Figure](96 + 112 [Figure] a) [Figure] 4,096[Figure] + 3
HiRDB parallel server configuration Front-end server 4
Back-end server [Figure](96 + 112 [Figure] a) [Figure] 4,096[Figure] + 3
Dictionary server [Figure](96 + 112 [Figure] a) [Figure] 4,096[Figure] + 3

a: Value of the pd_lck_until_disconnect_cnt operand