Interstage Shunsaku Data Manager Operator's Guide - Microsoft(R) Windows(R) 2000/ Microsoft(R) Windows Server(TM) 2003 - - UNIX -

D.3.3 The Size of Director Performance Log Files

The formula for estimating the size of director performance log files is shown below.

Definition unit	Variable Elements	Size (bytes)
The size of the performance log for search process	The number of search API that are executed (*1) The number of connected searchers Average size of search expressionAverage size of return expression	The number of search API that are executed x (700 + 200 x The number of connected searchers + Average size of search expression + Average size of return expression)
The size of the performance log for update process	The number of update API that are executed (*2) The number of connected searchers	The number of update API that are executed x (550 + 450 x The number of connected searchers)
The size of the performance log for search process when specifying direct access keys	The number of search API that are executed when specifying direct access keys (*1) Average size of direct access key Average size of return expression	The number of search API that are executed when specifying direct access keys x (400 + Average size of direct access key + Average size of return expression)
The size of the performance log for update process when specifying direct access keys	The number of update API that are executed when specifying direct access keys (*3) The number of connected searchers Average size of direct access key	The number of update API that are executed when specifying direct access keys x (650 + 450 x The number of connected searchers + Average size of direct access key)

*1) Including the search process, sort process and the aggregation.
*2) Including the add process, delete process, and update process.
*3) Including the update and delete processes that the direct access key is specified.

Example Calculation

An example calculation for the size of director performance log files is shown below.

If the variable elements are as follows:

• The number of search API that are executed: 10,000
• The number of update API that are executed: 10,000
• The number of search API that are executed when specifying direct access keys: 10,000
• The number of update API that are executed when specifying direct access keys: 10,000
• The number of connected searchers: 3
• Average size of search expression: 1,024 (bytes)
• Average size of return expression: 1,024 (bytes)
• Average size of direct access key: 12 (bytes)

The size of the performance log for search process

10,000  x (700 + 200 x 3 + 1,024 + 1,024) = 33,480,000 bytes (approx. 32 MB)

The size of the performance log for update process

10,000 x (550 + 450 x 3) = 19,000,000 bytes (approx. 18 MB)

The size of the performance log for search process when specifying direct access keys

10,000  x (400 + 12 + 1,024) = 14,360,000 bytes (approx. 14 MB)

The size of the performance log for update process when specifying direct access keys

10,000 x (650 + 450 x 3 + 12) = 20,120,000 bytes (approx. 19 MB)