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InnoDB : MySQL's ACID-compliant Storage Engine

0 votes
1 answer
328 views

InnoDB: SELECT COUNT(*) using primary key 25 times slower on Windows

MySql 5.6, InnoDB. I have a table with 8 million records. It has an integer primary key, and a unique index u1 CHAR(40). It also has a few small fields and a VARCHAR(1000). … Perhaps a bug in InnoDB on Windows? Or what? …
Per Lindberg's user avatar
2 votes

InnoDB: SELECT COUNT(*) using primary key 25 times slower on Windows

InnoDB seems to use the primary key as a "clustered index", meaning that it's welded to each record. …
Per Lindberg's user avatar