SLOWLOG LEN
Introduction and Use Case(s)
The SLOWLOG LEN
command is part of the Redis Slow Log feature, used to inspect the length of the slow query log. This log records queries that exceed a certain execution time threshold, allowing administrators to identify and optimize inefficient commands. Typical scenarios include performance monitoring and debugging.
Syntax
SLOWLOG LEN
Parameter Explanations
This command does not take any parameters.
Return Values
The SLOWLOG LEN
command returns an integer representing the number of entries in the slow log.
Example Outputs
(integer) 0
: No slow queries have been logged.(integer) 5
: There are five entries in the slow log.
Code Examples
dragonfly> SLOWLOG LEN
(integer) 3
Best Practices
- Regularly monitor the slow log length to maintain optimal performance.
- Adjust the
slowlog-log-slower-than
configuration to define what qualifies as a slow query based on your specific needs.
Common Mistakes
- Ignoring a high number of entries in the slow log, which may indicate underlying performance issues.
FAQs
How can I clear the slow log?
Use the SLOWLOG RESET
command to clear the slow log.
What defines a slow query in Redis?
A slow query exceeds the execution time threshold set by the slowlog-log-slower-than
configuration parameter.