eG Monitoring
 

Measures reported by UspCSWSMATest

An access path is a path through which data and commands are transferred within a disk subsystem. In a disk subsystem, channel adapters control data transfer between hosts and the cache memory. Disk adapters control data transfer between the cache memory and disk drives. Data transfer does not occur between channel adapters and disk adapters. Data is transferred via the cache switch (CSW) to the cache memory. When host issue commands, the commands are transferred via channel adapters to the shared memory (SM). The content of the shared memory is checked by disk adapters.

Performance Monitor tracks and displays the usage rate for the following access paths:

  • Paths between channel adapters and the cache switch
  • Paths between disk adapters and the cache switch
  • Paths between the cache switch and the cache memory
  • Paths between channel adapters and the shared memory
  • Paths between disk adapters and the shared memory

    • This test is used to identify the usage rates for access paths between Cache Switch and Cache memory information.

     The measures made by this test are as follows:

    Measurement Description Measurement Unit Interpretation
    short_CSWCMA This measure indicates the usage rates for access paths between Cache switch and Cache memory. Number