Concepts and Architecture Question:
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When does the LGWR writes all redo-enteries to the redo-log buffer?
Answer:
LGWR writes one contiguous portion of the buffer to disk. LGWR writes:
1. A commit record when a user process commits a transaction
2. Redo log buffers
– Every three seconds
– When the redo log buffer is one-third full
– When a DBWn process writes modified buffers to disk, if necessary
1. A commit record when a user process commits a transaction
2. Redo log buffers
– Every three seconds
– When the redo log buffer is one-third full
– When a DBWn process writes modified buffers to disk, if necessary
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