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Figure 5-7 Thread Activity panel
► Statements cache local hit ratio, which shows the percentage of SQL statements that
avoided prepares because the statements were retrieved from the local cache. It indicates
the effectiveness of the local SQL statement cache.
► DBD hit ratio, which shows the ratio, as a percentage, of successful requests for database
descriptors from the EDM pool to the total number of requests for database descriptors.
Thread activity
The Thread activity panel (Figure 5-7) shows a list of threads that are active at the moment
that you called the transaction. Each thread is associated with one SAP work process (More
than one thread per work process is possible).
Several utilities shows specific information for each thread:
► Buffer pool Activity
► Locking Activity
► Locked resources
► Data Sharing Locking Activity
► SQL Activity
► SQL Statement
► Lock waits
► Group Buffer Pool
► Times
Statement Cache
The Dynamic Statement Cache is a DB2 feature that stores, in a pool, prepared SQL
statements. These statements can be shared among threads, plans, and packages to avoid
preparation processes, thus improving performance.
DBA Cockpit has a utility that you can use to view and monitor the prepared SQL statements
that are stored in the dynamic statement cache. This tool is useful for finding expensive
statements in your system.
Several predefined filters are available that are helpful for finding queries that use the most
resources and that can be optimized to tune your system and applications.
Chapter 5. Managing and monitoring with IBM zEnterprise Unified Resource Manager 85