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    May 05
    2013

    Any reference doc for DB2 z/OS 10 SMF Compression?

    Charles Mills
    [Charles Mills Consulting, LLC]
    I see references here and there to SMF compression, and I see that there is
    a sample program available as an APAR, but I don't see any real
    documentation. I get no hits for 'compress' in "Managing Performance"
    Chapters 52 through 54. Where exactly is DB2 SMF compression documented? The
    bits and bytes of the SMF records, not the ZPARM.

    Thanks,
    Charles
    Lizette Koehler
    [Scana Corporation]
    Does this help?

    The SMFCOMP subsystem parameter specifies whether DB2R is to compress trace
    records that are to be written to SMF.
    Acceptable values: OFF, ON
    Default: OFF
    Update: option 14 on panel DSNTIPB
    DSNZPxxx: DSN6SYSP SMFCOMP

    OFF
    SMF trace records are not compressed.
    ON
    Trace records that are to be written to SMF are compressed. The z/OS
    compression service CSRCESRV compresses everything after the SMF header
    (SM100END, SM101END, or SM102END). See SM100, SM101, and SM102 for
    compression flags and the uncompressed size of compressed data

    Lizette


    -----Original Message-----
    From: Charles Mills [mailto:[login to unmask email]
    Sent: Sunday, May 05, 2013 8:23 PM
    To: [login to unmask email]
    Subject: [DB2-L] - Any reference doc for DB2 z/OS 10 SMF Compression?

    I see references here and there to SMF compression, and I see that there is
    a sample program available as an APAR, but I don't see any real
    documentation. I get no hits for 'compress' in "Managing Performance"
    Chapters 52 through 54. Where exactly is DB2 SMF compression documented? The
    bits and bytes of the SMF records, not the ZPARM.

    Thanks,
    Charles

    Yifat Oren
    [Time Machine Software]
    Hi Charles,

    Try "DB2 10 for z/OS Performance Topics" under "SMF Compression".

    HTH,
    Yifat

    -----Original Message-----
    From: Charles Mills [mailto:[login to unmask email]
    Sent: Monday, May 06, 2013 6:23 AM
    To: [login to unmask email]
    Subject: [DB2-L] - Any reference doc for DB2 z/OS 10 SMF Compression?

    I see references here and there to SMF compression, and I see that there is
    a sample program available as an APAR, but I don't see any real
    documentation. I get no hits for 'compress' in "Managing Performance"
    Chapters 52 through 54. Where exactly is DB2 SMF compression documented? The
    bits and bytes of the SMF records, not the ZPARM.

    Thanks,
    Charles

    -----End Original Message-----
    Charles Mills
    [Charles Mills Consulting, LLC]
    Thanks. Yes, a couple of more clues. I think I am on the trail of it now.

    Charles

    -----Original Message-----
    From: Lizette Koehler [mailto:[login to unmask email]
    Sent: Sunday, May 05, 2013 9:16 PM
    To: [login to unmask email]
    Subject: [DB2-L] - RE: Any reference doc for DB2 z/OS 10 SMF Compression?

    Does this help?

    The SMFCOMP subsystem parameter specifies whether DB2R is to compress trace
    records that are to be written to SMF.
    Acceptable values: OFF, ON
    Default: OFF
    Update: option 14 on panel DSNTIPB
    DSNZPxxx: DSN6SYSP SMFCOMP

    OFF
    SMF trace records are not compressed.
    ON
    Trace records that are to be written to SMF are compressed. The z/OS
    compression service CSRCESRV compresses everything after the SMF header
    (SM100END, SM101END, or SM102END). See SM100, SM101, and SM102 for
    compression flags and the uncompressed size of compressed data

    Lizette


    -----Original Message-----
    From: Charles Mills [mailto:[login to unmask email]
    Sent: Sunday, May 05, 2013 8:23 PM
    To: [login to unmask email]
    Subject: [DB2-L] - Any reference doc for DB2 z/OS 10 SMF Compression?

    I see references here and there to SMF compression, and I see that there is
    a sample program available as an APAR, but I don't see any real
    documentation. I get no hits for 'compress' in "Managing Performance"
    Chapters 52 through 54. Where exactly is DB2 SMF compression documented? The
    bits and bytes of the SMF records, not the ZPARM.
    Jeff Jerry
    And before you use this make sure any non-IBM vendors that extract information from the DB2 SMF records can support SMF compression.

    There is no utility that you can use prior to turning it on that will tell you what your compression rate will be. You need to turn on compression and run the utility found in member DSNTEJDS in SDSNSAMP after the data is compressed.

    -----Original Message-----
    From: Charles Mills [mailto:[login to unmask email]
    Sent: Monday, May 06, 2013 8:46 AM
    To: [login to unmask email]
    Subject: [DB2-L] - RE: Any reference doc for DB2 z/OS 10 SMF Compression?

    Thanks. Yes, a couple of more clues. I think I am on the trail of it now.

    Charles

    -----Original Message-----
    From: Lizette Koehler [mailto:[login to unmask email]
    Sent: Sunday, May 05, 2013 9:16 PM
    To: [login to unmask email]
    Subject: [DB2-L] - RE: Any reference doc for DB2 z/OS 10 SMF Compression?

    Does this help?

    The SMFCOMP subsystem parameter specifies whether DB2R is to compress trace records that are to be written to SMF.
    Acceptable values: OFF, ON
    Default: OFF
    Update: option 14 on panel DSNTIPB
    DSNZPxxx: DSN6SYSP SMFCOMP

    OFF
    SMF trace records are not compressed.
    ON
    Trace records that are to be written to SMF are compressed. The z/OS compression service CSRCESRV compresses everything after the SMF header (SM100END, SM101END, or SM102END). See SM100, SM101, and SM102 for compression flags and the uncompressed size of compressed data

    Lizette


    -----Original Message-----
    From: Charles Mills [mailto:[login to unmask email]
    Sent: Sunday, May 05, 2013 8:23 PM
    To: [login to unmask email]
    Subject: [DB2-L] - Any reference doc for DB2 z/OS 10 SMF Compression?

    I see references here and there to SMF compression, and I see that there is a sample program available as an APAR, but I don't see any real documentation. I get no hits for 'compress' in "Managing Performance"
    Chapters 52 through 54. Where exactly is DB2 SMF compression documented? The bits and bytes of the SMF records, not the ZPARM.

    -----End Original Message-----
    Charles Mills
    [Charles Mills Consulting, LLC]
    LOL. I are one of those non-IBM vendors, hence the interest.

    Charles

    -----Original Message-----
    From: Jeff Jerry [mailto:[login to unmask email]
    Sent: Monday, May 06, 2013 7:28 AM
    To: [login to unmask email]
    Subject: [DB2-L] - RE: Any reference doc for DB2 z/OS 10 SMF Compression?

    And before you use this make sure any non-IBM vendors that extract
    information from the DB2 SMF records can support SMF compression.

    Jeff Jerry
    :-)

    -----Original Message-----
    From: Charles Mills [mailto:[login to unmask email]
    Sent: Monday, May 06, 2013 3:22 PM
    To: [login to unmask email]
    Subject: [DB2-L] - RE: Any reference doc for DB2 z/OS 10 SMF Compression?

    LOL. I are one of those non-IBM vendors, hence the interest.

    Charles

    -----Original Message-----
    From: Jeff Jerry [mailto:[login to unmask email]
    Sent: Monday, May 06, 2013 7:28 AM
    To: [login to unmask email]
    Subject: [DB2-L] - RE: Any reference doc for DB2 z/OS 10 SMF Compression?

    And before you use this make sure any non-IBM vendors that extract information from the DB2 SMF records can support SMF compression.


    -----End Original Message-----

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