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MySQL has several different log files that can help you find
out what's going on inside mysqld
:
Log file | Description |
The error log | Problems encountering starting, running or stopping mysqld . |
The isam log | Logs all changes to the ISAM tables. Used only for debugging the isam code. |
The query log | Established connections and executed queries. |
The update log | Deprecated: Stores all statements that changes data |
The binary log | Stores all statements that changes something. Used also for replication |
The slow log | Stores all queries that took more than long_query_time seconds to execute or didn't use indexes. |
All logs can be found in the mysqld
data directory. You can
force mysqld
to reopen the log files (or in some cases
switch to a new log) by executing FLUSH LOGS
. See section 13.5.4.2 FLUSH
Syntax.
5.8.1 The Error Log | ||
5.8.2 The General Query Log | ||
5.8.3 The Update Log | ||
5.8.4 The Binary Log | ||
5.8.5 The Slow Query Log | ||
5.8.6 Log File Maintenance |