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IMS Waits

Fast Path Overflow Buffer Allocation

The collector found the application program processing the thread waiting for a Fast Path overflow buffer. The thread has reached the maximum number of buffers allowed, (as specified by the NBA execution parameter) and overflow processing is in progress. Overflow processing increased the buffer allocation by the amount allowed for overflow (OBA).

Fast Path Overflow Buffer Lock

The collector found the application program processing the thread waiting for the Fast Path overflow buffer lock.

If a thread attempts to allocate buffers beyond the normal number of buffers allowed (NBA), overflow processing takes place. Overflow processing attempts to increase the buffer allocation by the amount allowed for overflow (OBA). The overflow lock is required to allocate more buffers than the number specified by normal buffer allocation. The overflow lock is enqueued by the thread and held until sync point processing, at which time the buffer allocation is returned to normal.

Fast Path Pseudo Abend

The collector found the Fast Path application program processing the thread IWAITing while the thread was pseudo abended.

Fast Path Resource Latch

The collector found the application program processing the thread waiting for the Fast Path resource latch.

The Fast Path Resource latch serializes access to the exclusive control resource blocks (XCRBs). XCRBs represent the status of a currently-owned (and possibly exclusively-controlled) resource within a DEDB area.

Fast Path Sync Processing The collector found the thread in sync point processing.

During this state, the thread is using CPU; however, the amount of time spent in this state should be small.

Fast Path Sync Lock

The collector found the application program processing the thread waiting for the Fast Path sync lock.

The Fast Path sync lock serializes the sync point processing in threads with check-point processing and other activities which stop a DEDB area, such as issuing a /STOP AREA, /STOP ADS, or /DBR AREA command, or if a physical I/O error is detected.

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OMEGAMON II for DBCTL Historical Component (EPILOG) Reference Manual Version 510

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