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Informix Interview Question:
Explain about light scans in Informix?
Submitted by: AdministratorLight scans occur under the following conditions: The optimizer chooses a sequential scan of the table. The number of pages in the table is greater than the number of buffers in the buffer pool. The isolation level obtains no lock or a shared lock on the table: Dirty Read (including non logging databases) isolation level Repeatable Read isolation level if the table has a shared or exclusive lock
Committed Read isolation if the table has a shared lock
Submitted by: Administrator
Committed Read isolation if the table has a shared lock
Submitted by: Administrator
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