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How to fix poor performance of INFORMATION_SCHEMA.key_column_usage in MySQL?
You can use GLOBAL variable as shown below −
SET global innodb_stats_on_metadata =0;
After including the above syntax, the INFORMATION_SCHEMA.key_column_usage will take less time and that would improve the performance.
The query is as follows −
mysql> set global innodb_stats_on_metadata =0; Query OK, 0 rows affected (0.00 sec) mysql> SELECT REFERENCED_TABLE_NAME,TABLE_NAME,COLUMN_NAME,CONSTRAINT_SCHEMA -> FROM INFORMATION_SCHEMA.key_column_usage;
The following is the output −
It returns 674 rows in 0.28 seconds.
Updated on: 30-Jul-2019
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