Creating a secondary index causes the system to build a subtable to contain its index rows, thus adding another set of rows that requires updating each time a table row is inserted, deleted, or updated.
Why dont you take a huge table with one SI and one with 32 SI and run explain on any dml operation.
Creating a secondary index causes the system to build a subtable to contain its index rows, thus adding another set of rows that requires updating each time a table row is inserted, deleted, or updated.
Why dont you take a huge table with one SI and one with 32 SI and run explain on any dml operation.