eG Monitoring
 
Measures reported by SybLockTest

The SybLockTest, executed by an internal agent, tracks the statistics pertaining to the lock and deadlock traffic of the Sybase Adaptive Server. The measures made by this test are as follows:

Measurement Description Measurement Unit Interpretation
Lock_requests The average number of lock requests per second Locks/Sec A high value indicates that there is high locking activity in the system and may need close scrutiny for the type of locks being requested. The detailed diagnosis for this measure provides a listing of locks requests for each lock type.
Lock_waits The average number of times there was lock contention as a percentage of the total number of lock requests Waits/Sec A high value of waits can have an adverse impact on application performance. Possible reasons for this behavior could be:
  • Inadequate number of locks available in the database
  • Unusually high locking behavior of applications accessing the database
  • Improper database application design, etc.

The detailed diagnosis for this measure provides a listing of waited number of locks for each lock type.
Avg_lock_wait_time The average amount of wait time for each lock request that resulted in a wait Secs A high value may indicate that there is contention for locks in the system. When the average wait time for locks is high, users may have to wait for their transactions to complete.
Lock_timeouts The number of times a task was waiting for a lock and the transaction was rolled back due to a session-level or server-level lock timeout Timeouts/Sec Lock timeouts can be useful for removing tasks that acquire some locks, and then wait for long periods of time blocking other users. The detailed diagnosis for this measure provides a listing of lock timeouts for each lock type.
Dead_locks The average number of deadlocks found in the lock requests Number A deadlock may arise due to various situations including bad design of queries and deficient coding practices. A deadlock is a situation where both/all the lock requestors are in a mutual or a multi-way tie. Any deadlocks are detrimental to database application performance. The detailed diagnosis for this measure provides a listing of number of dead locks for each lock type.