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This is an Exadata wait event that occurs when a storage cell is starting and opening a cell for use. Solutions This is a normal part of starting up the storage cell in an Exadata system...

This is an Exadata wait event that occurs when a storage cell is starting and discovering disks. Solutions This is a normal part of starting up the storage cell in an Exadata system. If there a...

This is an Exadata wait event that occurs during the shutdown of a storage cell. This is normal activity associated with shutdown processing. Solutions If there are queries waiting on this even...

This is an Exadata wait event similar to 'db file parallel read' and normally occurs during multi-block reads of non-contiguous blocks. The most common operations associated with this wait event are i...

Background A user process acquires this latch to scan the SGA for database cache buffers. Blocks in the buffer cache are placed on linked lists (cache buffer chains). Blocks are put on the hash chain ...

This latch is needed when user processes try to scan the LRU (least recently used) chain containing blocks in the buffer cache. This latch must be acquired before the block can be inserted into (when ...

Wait occurs when a session attempts to access a block in memory, is denied and must wait until the buffer becomes available. This event happens because a buffer is either being read into the buffer ca...

Wait is related to the sizing / usage of the CTWR dba buffer in the Large Pool memory structure more ... Solutions Problem: When a session waits on the "Block Change Tracking Buff...

Oracle 10gR2 and higher automatically tunes the undo retention period based on how the undo tablespace is configured. If the undo tablespace is configured with the AUTOEXTEND option, the database dyna...

One of the main new features associated with Exadata systems is that I/O can be offloaded to storage servers rather than be done on the database server. Each of the storage servers may get a piece of ...