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ISAM Troubleshooting
The following are problems encountered with the ISAM storage structure, and their solutions:
Problem
Solution
You try to use pattern matching, but do not specify the leftmost character.
*F* does not use the ISAM index, whereas F* does. If you cannot modify the search condition, the entire table must be scanned.
You try to use just part of a multi-column key, but do not specify the leftmost column.
If you cannot modify the search condition, create a secondary index with only the columns on which you are searching.
The table is growing quickly and new rows are added to overflow pages.
Use B-tree instead.
Last modified date: 01/30/2023