HP OpenVMS Systems

Locating Frequently-Accessed (Hot) RMS Files?

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The Question is:

 
How can I tell which are the hot files on a particular disk?
 

The Answer is :

 
  With XFC installed:
 
$ sho memo/cache=(vol=sys$sysdevice:,topqio:3)
              System Memory Resources on  7-JAN-2004 19:29:16.86
 
Extended File Cache Top QIO File Statistics:
 
_$1$DGA709: (DISK$ALPHAVMS731), Caching mode is VIOC Compatible
 
_$1$DGA709:[VMS$COMMON.SYSLIB]CMSSHR.EXE;4 (open)
 Caching is enabled, active caching mode is Write Through
    Allocated pages             35     Total QIOs             420284
    Read hits               420068     Virtual reads          420285
    Virtual writes               0     Hit rate                   99 %
    Read aheads                  0     Read throughs          420285
    Write throughs               0     Read arounds                0
                                       Write arounds               0
 
_$1$DGA709:[VMS$COMMON.SYSLIB]LIBRTL.EXE;1 (open)
 Caching is enabled, active caching mode is Write Through
    Allocated pages             15     Total QIOs             341077
    Read hits               340964     Virtual reads          341077
    Virtual writes               0     Hit rate                   99 %
    Read aheads                  0     Read throughs          341076
    Write throughs               0     Read arounds                1
... etc ...
 
$  sho memo/cache=(file=sys$sysdevice:[000000...sysexe              ]*.exe)
              System Memory Resources on  7-JAN-2004 19:36:26.41
 
Extended File Cache File Statistics:
 
_$1$DGA709:[VMS$COMMON.SYSEXE]ACME_SERVER.EXE;1 (open)
 Caching is enabled, active caching mode is Write Through
    Allocated pages              0     Total QIOs                 10
    Read hits                    0     Virtual reads              10
    Virtual writes               0     Hit rate                    0 %
    Read aheads                  0     Read throughs              10
    Write throughs               0     Read arounds                0
                                       Write arounds               0
 
_$1$DGA709:[VMS$COMMON.SYSEXE]ANALYZOBJ.EXE;1 (closed)
 Caching is enabled, active caching mode is Write Through
    Allocated pages             18     Total QIOs                248
    Read hits                  236     Virtual reads             248
    Virtual writes               0     Hit rate                   95 %
    Read aheads                  0     Read throughs             248
    Write throughs               0     Read arounds                0
                                       Write arounds               0
 
See 'Help show memory/cache' for more details.
 

  

     

     
answer written or last revised on ( 12-JAN-2004 )
     
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