Hi, Is somebody know how to calculate the average dasd response time from WLM Period's connect/disconnect/wait/iosq times ?
On my shop, we use SYSVIEW. In his option WLM, we can see the I/O metrics but I don't understand how is calculated the average response time. For the example, how is calculated the 0.022968 second average connect time ? I thought that it was simply the amount of connect time in microseconds divided by the total I/O count, but 3527936 / 19661 = 179.4382 that is far away of 22968 microseconds (0.022968 seconds)... SYSVIEW, option WLM for a particular WLM Period : Resource Value Average Total service units for period 82495 CPU service units 77274 SRB service units 5221 Swap count 6 I/O interupt time 0.044067 Average swapped-in transactions 0 Total frames 0 RCT time 0.001301 Average active transactions 0 DASD I/O count 19661 DASD I/O connect time 3.527936 0.022968 DASD I/O disconnect time 1.666304 0.010848 DASD I/O wait time 0.000896 0.000006 In the RCAERESC structure of IWMWRCAA mapping, it's mentionned that the Total DASD I/O count "can be used with fields RCAEIOCT, RCAEIODT, RCAEIOWT, RCAEIOST to determine average DASD response time for the period" but without more details. https://www.ibm.com/docs/en/zos/2.5.0?topic=SSLTBW_2.5.0/com.ibm.zos.v2r5.iead300/IWMWRCAA-map.html Thanks for your help to understand this calculation. Regards Guillaume ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
