MQ tables and index: CIUMQ1

Calculation of the space required for the DB2® tablespace and DB2 index for Websphere MQ data.

To calculate the space, in KB, to allocate for the DB2 tablespace and the DB2 index required for Websphere MQ data, you need to estimate the total number of rows.

This number is calculated from the following values; see Values required for each CICS® region.
  • NUM_MQ_PROG
  • AVG_MQ
  • PROG_TRAN_RATIO
  • NUM_REGION_D
Calculate the number of rows for the DB2 table as follows:
NUM_ROWS = (NUM_MQ_PROG * AVG_MQ * 
            PROG_TRAN_RATIO * NUM_REGION_D) 

Use the value calculated for NUM_ROWS and the values for ROW_SIZE and PERCENT_FREE in Table 1 to calculate the PRIQTY and SECQTY as described in Figure 1 for the MQ tablespace.

Table 1. Worksheet for MQ tablespace
Tablespace Row_Size Percent_Free PRIQTY SECQTY
CIUMQD 163 15    
Indexes        
XIMQD1 107 20    

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Timestamp icon Last updated: Friday, 7 February 2014


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