What is the slow log table in MySQL?
The mysql.slow_log table stores the contents of the Slow Query Log if slow logging is active and the output is being written to table (see Writing logs into tables ). It contains the following fields: Time the query began. User and host combination. Total time the query took to execute.
How big is a blob of data in SQL?
After all, a single BLOB data item may require hundreds of pages of storage. To keep tables optimized, the MS-SQL Server stores any BLOB data that is larger than 256 bytes in a separate area on disk. The server then places a pointer to the first page of BLOB data into the TEXT, NTEXT, or IMAGE column in the table.
Is there way to log blobs in DBMS?
As such, DBMS products either do not support the logging of BLOB data or let you control the logging by providing a stored procedure (or other utility) you can use to turn it on and off.
Can a program process an entire blob of data?
As mentioned in Tip 462, “Understanding the Challenges Presented by Binary and Character Large Object (BLOB) Processing,” most application programs that work with database data cannot hold an entire BLOB in a memory buffer at once. Instead, the programs must process the BLOB in sections.
How to find the slow running query in SQL?
In sql_text column instead of query it is showing “throttle: index not used’ warning (s) suppressed”. Could someone help me how to find the slow running query. Unfortunately, you are not going to get those queries from mysql.slow_log.
What does it mean to see file slow query log?
If you see FILE,TABLE that means there is a text version of the slow query log. You will have to get your SysAdmin to get you the desired slow log info (Starbucks GiftCard might be required for this one. If the slow log file contains the same messages, take your Starbucks GitftCard back.)
How to manage a growing MySQL general log table?
For those who used MySQL RDS and enable the slow log, Amazon will use CSV only. The RDS environment can auto-rotate at a specific time every night. If you using MySQL RDS and wish to use slow logs, let RDS do its thing. Jan 08, 2012 : How to enable MySQL general log?