Hello TechXchange!

A problem has occurred with C2POLICE causing intermittent contention, delays with the ACF2BKUP dbase backups.  Also seen in trying to analyze this problem are the messages C2P0189E C2P0345W where I think the LPAR (zOS 2.5) is getting more busy with work and in producing the myriad of SMF records and the original configuration of zSecure Alert needs to be upgraded or reassessed. 

Using the 3.1 documentation page 5 'Configuration guidelines and performance implications' we used the formula recommendations and find the following:

ACF2 Type229 produces 4,000,000 records per day with a length of 1674, SMF Type30 produces 254,000 records per day with a length of 1947.  Using the examples provided I was trying to estimate some new Bufsize NumBufs values for the OPTIONS.  4000000/1440=2778 per minute for ACF2 and 254000/1440=176 per minute for SMF30.  The average ACF2 record length is 1674, the average SMF30 record length is 1947.  To find the average buffer size per interval, ACF2 at 2778x1674=4650372 added to 176x1947=342672  for a total value of 4993044 for the average buffer size per interval.  For the normal system fluctuations we take the average value found 493044x5 (factor 5) and we find a value of 24965220  -  a 25M buffer size!   I don't know if I'm doing this right.  I'm sure of the SMF numbers that I derived from the daily, end of day accumulation of SMF but can we specify a 25M buffer size?  It would probably impact the system significantly.  The 'number of buffers' used we would specify as recommended in this document (12 per the formula recommendation). 

BUFSIZE 25M

NUMBUFS 12

Could you verify the values I calculated using the example from the document? ("zSecure Alert User Reference" manual 'Configuration guidelines and performance implications')

Hi Lynn

zSecure would typically use SMF subtypes 1 and 5 for record type 30, that is, if the subtype parameter was used in the data collection parameters.  Those are a lot shorter than your 1947 average.

When you arrive at a required buffer size of 25 MB, that is the total buffer pool size needed to cover a busy minute.  The total pool size (25 MB) would be split between the 12 buffers you allocate, i.e. each individual buffer could be 2 MB.

You can monitor buffer usage by using the DEBUG BUFFER command.

Also make sure C2POLICE is running with the STC medium WLM priority, not in the batch priority.

Hello TechXchange!

A problem has occurred with C2POLICE causing intermittent contention, delays with the ACF2BKUP dbase backups.  Also seen in trying to analyze this problem are the messages C2P0189E C2P0345W where I think the LPAR (zOS 2.5) is getting more busy with work and in producing the myriad of SMF records and the original configuration of zSecure Alert needs to be upgraded or reassessed. 

Using the 3.1 documentation page 5 'Configuration guidelines and performance implications' we used the formula recommendations and find the following:

ACF2 Type229 produces 4,000,000 records per day with a length of 1674, SMF Type30 produces 254,000 records per day with a length of 1947.  Using the examples provided I was trying to estimate some new Bufsize NumBufs values for the OPTIONS.  4000000/1440=2778 per minute for ACF2 and 254000/1440=176 per minute for SMF30.  The average ACF2 record length is 1674, the average SMF30 record length is 1947.  To find the average buffer size per interval, ACF2 at 2778x1674=4650372 added to 176x1947=342672  for a total value of 4993044 for the average buffer size per interval.  For the normal system fluctuations we take the average value found 493044x5 (factor 5) and we find a value of 24965220  -  a 25M buffer size!   I don't know if I'm doing this right.  I'm sure of the SMF numbers that I derived from the daily, end of day accumulation of SMF but can we specify a 25M buffer size?  It would probably impact the system significantly.  The 'number of buffers' used we would specify as recommended in this document (12 per the formula recommendation). 

BUFSIZE 25M

NUMBUFS 12

Could you verify the values I calculated using the example from the document? ("zSecure Alert User Reference" manual 'Configuration guidelines and performance implications')