question- how effective are indexes when it comes to large tables? If you have a very very large mysql table, at what point do indexes become ineffective when it comes to searching the table?
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question- how effective are indexes when it comes to large tables? If you have a very very large mysql table, at what point do indexes become ineffective when it comes to searching the table?
The main purpose of an index is to prevent full scanning of a “very large” table whenever you search for a certain row so technically the larger the table gets the more “effective” the index becomes because the full scanning becomes more expensive.