gtpo1mgy | Operations |
Use this command to display information about the efficiency of virtual file access (VFA).
Requirements and Restrictions
None.
Format
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Additional Information
Online help information is available for this command. To display the help information, enter one of the following:
ZVFAC HELP
ZVFAC ?
Examples
Information about the efficiency of VFA is displayed in the following example.
+--------------------------------------------------------------------------------+ |User: ZVFAC IND | | | |System: VFAC0024I 17.26.20 VFA EFFICIENCY STATISTICS | | | | FAST RSHT'S IN USE (PERCENT) 3 | | AVERAGE ALIAS CHAIN LENGTH 1.04 | | LONGEST ALIAS CHAIN 2 | | | | MASTER RSHT'S IN USE (PERCENT) 3 | | AVERAGE ALIAS CHAIN LENGTH 1.02 | | LONGEST ALIAS CHAIN 2 | | | | PROG READS 0 PER SEC. | | DATA READS 913 | | FIND I/O 49 | | FILE CAND 913 | | FILE IMMD 913 | | FORCE FILE 0 | | FILE NCAND 1 | | REJECTED 0 | | 381 USAGE 2 | | 1055 USAGE 3 | | 4K USAGE 44 | | | | | | VFA-S HITS 0 | | VFA-X HITS 1786 | | VFA LOCK MISSES 43 | | VFA CONTENTIONS 21 | | RHT CONTENTIONS 21 | | CACHED RHT HITS 882 | | VFA LOCK AGEOUTS 0 | | | | INTERVAL 147 SECS.+ | +--------------------------------------------------------------------------------+
Related Information
See TPF Database Reference for more information about VFA.