This wait event will happen when all buffer gets have been suspended. This could happen when a file was read-only and is now read-write. All the existing buffers need to be invalidated since they are ...
This wait event only occurs when Flashback Database is turned on. A session waits for recovery writer (RVWR) to write flashback data to the flashback logs on disk because the buffers are full. Until R...
A direct path write I/O operation is just the opposite of the direct path read operation, and it writes buffers from a session's PGA to the datafiles. The direct path write operation allows a session ...
A direct path read I/O operation reads data into the session's PGA instead of the SGA. Direct read I/Os may be performed in synchronous or asynchronous mode, depending on the platform and the value of...
An Oracle session logs the db file sequential read wait event when it has to wait for a single-block I/O read request to complete. Oracle issues single-block I/O read requests when reading from indexe...
A Rollback Segment records the old values of data that were changed by each transaction, whether committed or not. The information in a rollback segment is used to: Generate read-consistent database ...
The db file scattered read wait event is similar to the db file sequential read, except that the session is waiting for a multi-block I/O read request to complete. The db file scattered read waits are...
Q: How do I change my connection color? A: In Toad for Oracle 11: Click on a connection in the log-in window. Scroll over to the Color column. Click within that field to access the list of colors. ...
Inspect SGA retrieves executed SQL statements from Oracle’s System Global Area or currently running SQL statements from Oracle’s open cursor. Once you retrieve the statements, Inspect SGA displays the...
Using SQL Rewrite mode in Optimize SQL consists of two steps. In the first step, SQL Optimizer generates semantically equivalent alternatives with unique execution plans for your original SQL statemen...
You can analyze the impact of new indexes on your SQL statement's execution plans before you physically create the indexes on your database. You can create indexes in Optimize SQL or Optimize Indexes ...
Outline Management displays stored outlines deployed using SQL Rewrite mode in Optimize SQL. To manage outlines Select the Manage Plans tab in the main window. Tip: Select the Show Manage Plans che...
