6.3.1 Determining the shared memory requirement

This subsection explains how to determine the amount of shared memory the HADB server will use.

Use the following formula to determine the amount of shared memory required by the HADB server.

Formula

shared-memory =
     shared-memory-management-area + global-buffer-page + process-common-memory
     + real-thread-private-memory^#1
     × (value-specified-for-adb_sys_max_users-operand-in-server-definition
       + value-specified-for-adb_sys_rthd_num-operand-in-server-definition + 10)
       + real-thread-private-memory^#2

#1

Applies to the variables in (4) Determining the real thread private memory requirement, excluding the following:

RTHD_IMPORTSZ
RTHD_IDXRBLDSZ
RTHD_GETCOSTSZ
RTHD_DBSTATUSSZ
RTHD_EXPORTSZ
RTHD_MERCHKSZ
RTHD_ARCCKSZ
RTHD_UNARCCKSZ
RTHD_REORGSZ
RTHD_CLTDEFMNG
RTHD_SYNDICTSZ
RTHD_AUDTRAILSZ
RTHD_CONVERTAUDSZ

#2

Applies to the following variables in (4) Determining the real thread private memory requirement:

RTHD_IMPORTSZ
RTHD_IDXRBLDSZ
RTHD_GETCOSTSZ
RTHD_DBSTATUSSZ
RTHD_EXPORTSZ
RTHD_MERCHKSZ
RTHD_ARCCKSZ
RTHD_UNARCCKSZ
RTHD_REORGSZ
RTHD_CLTDEFMNG
RTHD_SYNDICTSZ
RTHD_AUDTRAILSZ
RTHD_CONVERTAUDSZ

The following subsections explain how to determine the requirements for the shared memory management area, global buffer page, process common memory, and real thread private memory.

Organization of this subsection

(1) Determining the shared memory management area requirement
(2) Determining the global buffer page requirement
(3) Determining the process common memory requirement
(4) Determining the real thread private memory requirement

(1) Determining the shared memory management area requirement

The shared memory management area is used in the cases described below. You must determine the requirement for the shared memory management area required in each of these cases.

During startup of the HADB server

See (1) Determining the shared memory management area requirement (for starting the HADB server) in 6.3.3 Determining the memory requirement for starting the HADB server.
During execution of the adbinit command

See (1) Determining the shared memory management area requirement (for executing the adbinit command) in 6.3.5 Determining the memory requirement for executing the adbinit command.

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(2) Determining the global buffer page requirement

A global buffer page is used for starting the HADB server. To determine the global buffer page requirement, see (2) Determining the global buffer page requirement (for starting the HADB server) in 6.3.3 Determining the memory requirement for starting the HADB server.

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(3) Determining the process common memory requirement

Use the formula shown below to determine the process common memory requirement.

Formula (megabytes)

[Figure]

#

Add the value obtained by subtracting the value of the PROC_STAINF variable from the value of the PROC_STARTSZ variable.

Explanation of variables

PROC_STARTSZ

Process common memory used for starting the HADB server

Determine the value as explained in (3) Determining the process common memory requirement (for starting the HADB server) under 6.3.3 Determining the memory requirement for starting the HADB server.
PROC_EXECSZ

Process common memory to be used during normal operation

Determine the value as explained in (1) Determining the process common memory requirement (during normal operation) under 6.3.4 Determining the memory requirement during normal operation.
PROC_STAINF

Process common memory used to store control information for statistical information

Determine the value according to (p) Determining the variable PROC_STAINF in (3) Determining the process common memory requirement (for starting the HADB server) under 6.3.3 Determining the memory requirement for starting the HADB server.

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(4) Determining the real thread private memory requirement

Use the formula shown below to determine the real thread private memory requirement.

Formula (megabytes)

[Figure]

Explanation of variables

RTHD_STARTSZ

Real thread private memory used for starting the HADB server

Determine the value as explained in (4) Determining the real thread private memory requirement (for starting the HADB server) under 6.3.3 Determining the memory requirement for starting the HADB server.
RTHD_EXECSZ

Real thread private memory to be used during normal operation

Determine the value as explained in (2) Determining the real thread private memory requirement (during normal operation) under 6.3.4 Determining the memory requirement during normal operation.
RTHD_IMPORTSZ

Real thread private memory to be used when executing the adbimport command

Determine the value as explained in (2) Determining the real thread private memory requirement (for executing the adbimport command) under 6.3.6 Determining the memory requirement for executing the adbimport command.
RTHD_IDXRBLDSZ

Real thread private memory to be used when executing the adbidxrebuild command

Determine the value as explained in (2) Determining the real thread private memory requirement (for executing the adbidxrebuild command) under 6.3.7 Determining the memory requirement for executing the adbidxrebuild command.
RTHD_GETCOSTSZ

Real thread private memory to be used when executing the adbgetcst command

Determine the value as explained in (2) Determining the real thread private memory requirement (for executing the adbgetcst command) under 6.3.8 Determining the memory requirement for executing the adbgetcst command.
RTHD_DBSTATUSSZ

Real thread private memory to be used when executing the adbdbstatus command

Determine the value as explained in (2) Determining the real thread private memory requirement (for executing adbdbstatus command) under 6.3.9 Determining the memory requirement for executing the adbdbstatus command.
RTHD_EXPORTSZ

Real thread private memory to be used when executing the adbexport command

Determine the value as explained in (2) Determining the real thread private memory requirement (during execution of the adbexport command) under 6.3.10 Determining the memory requirement for executing the adbexport command.
RTHD_MERCHKSZ

Real thread private memory to be used when executing the adbmergechunk command

Determine the value as explained in (2) Determining the real thread private memory requirement (for executing the adbmergechunk command) under 6.3.13 Determining the memory requirement for executing the adbmergechunk command.
RTHD_ARCCKSZ

Real thread private memory used for executing the adbarchivechunk command

Determine the value as explained in (2) Determining the real thread private memory requirement (for executing the adbarchivechunk command) under 6.3.16 Determining the memory requirement for executing the adbarchivechunk command.
RTHD_UNARCCKSZ

Real thread private memory used for executing the adbunarchivechunk command

Determine the value as explained in (2) Determining the real thread private memory requirement (for executing the adbunarchivechunk command) under 6.3.17 Determining the memory requirement for executing the adbunarchivechunk command.
RTHD_REORGSZ

Real thread private memory used for executing the adbreorgsystemdata command

Determine the value as explained in (2) Determining the real thread private memory requirement (for executing the adbreorgsystemdata command) under 6.3.18 Determining the memory requirement for executing the adbreorgsystemdata command.
RTHD_CLTDEFMNG

Real thread private memory used for executing the adbclientdefmang command

Determine the value as explained in (2) Determining the real thread private memory requirement (for executing the adbclientdefmang command) under 6.3.19 Determining the memory requirement for executing the adbclientdefmang command.
RTHD_SYNDICTSZ

Real thread private memory used for executing the adbsyndict command

Determine the value as explained in (2) Determining the real thread private memory requirement (for executing the adbsyndict command) under 6.3.20 Determining the memory requirement for executing the adbsyndict command.
RTHD_AUDTRAILSZ

Real thread private memory used when executing the adbaudittrail command

Determine the value as explained in (2) Determining the real thread private memory requirement (for executing the adbaudittrail command) under 6.3.21 Determining the memory requirement for executing the adbaudittrail command.
RTHD_CONVERTAUDSZ

Real thread private memory used for executing the adbconvertaudittrailfile command

Determine the value as explained in 6.3.22 Determining the memory requirement for executing the adbconvertaudittrailfile command.

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