? VIOC_RESET, SYSTEM_MANAGEMENT, Reset Virtual I/O Cache counters    A The Virtual I/O Cache (VIOC) is a clusterwide, file-oriented disk A cache available to all supported configurations, from single-node A systems to large mixed-interconnect VMScluster systems.  Any base 8 system can use VIOC, no additional license is required.   A There are applications that cause the VIOC counters to be skewed, B resulting in an incorrect interpretation of the usefullness of the< VIOC.  By resetting the counters, the SHOW MEMORY/CACHE/FULL0 display depicts a more accurate use of the VIOC.  C The following discussion is relevant to the SHOW MEMORY/CACHE/FULL   display:  ?     The BACKUP utility typically causes a large increase to the >     "Read IO Count" while incurring no read hits. Depending on@     the amount of data being backed up, the increase to "Read IO=     Count" can be drastic in a short span of time.  Since the A     "Read Hit Rate" remains somewhat flat for this same period of ;     time, the calculated "Hit%" will be skewed.  The skewed =     values will remain until the system is rebooted, or until =     enough time and I/Os, with an equitable hit rate, occur.  ?     Typically, "IO Bypassing Cache" will increase in proportion      to "Read IO Count".      Counters reset by this program:   % CACHE$GL_VREAD,   the Read IO counter & CACHE$GL_READHIT, the Read Hit counter& CACHE$GL_VWRITE,  the Write IO counter8 CACHE$GL_RRNDMOD, Read IO bypassing VIOC due to function4 CACHE$GL_RRNDSIZ, Read IO bypassing VIOC due to size9 CACHE$GL_WRNDMOD, Write IO bypassing VIOC due to function 5 CACHE$GL_WRNDSIZ, Write IO bypassing VIOC due to size   C Submitted by: Reg Hunter, Customer Support Center, Colorado Springs 