Slow log for performance analysis in Redis - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of the Redis slow log?

The Redis slow log records commands that take longer than a specified time to execute, helping identify performance bottlenecks.

intermediate

How do you configure the minimum execution time for commands to be logged in Redis slow log?

Use the configuration parameter slowlog-log-slower-than to set the minimum execution time in microseconds for commands to be logged.

beginner

Which Redis command retrieves the slow log entries?

The SLOWLOG GET [count] command retrieves the latest slow log entries, where count is optional and limits the number of entries returned.

intermediate

What information does each slow log entry contain?

Each entry includes the unique entry ID, timestamp, execution time in microseconds, and the command arguments executed.

beginner

How can you clear all entries from the Redis slow log?

Use the command SLOWLOG RESET to clear all slow log entries.

What does the Redis slow log help you find?

A Commands that take a long time to execute

B Commands that failed to execute

C Commands that use too much memory

D Commands that are frequently used

The slow log records commands that take longer than a set time to execute, helping find slow commands.

Which command shows the slow log entries in Redis?

A SLOWLOG LIST

B SLOWLOG GET

C SLOWLOG SHOW

D SLOWLOG DISPLAY

The correct command to retrieve slow log entries is SLOWLOG GET.

What unit is used to measure command execution time in the Redis slow log?

A Nanoseconds

B Seconds

C Milliseconds

D Microseconds

Execution time in the slow log is measured in microseconds.

How do you clear all slow log entries in Redis?

A SLOWLOG DELETE

B SLOWLOG CLEAR

C SLOWLOG RESET

D SLOWLOG REMOVE

The command SLOWLOG RESET clears all slow log entries.

Which configuration sets the minimum time for logging slow commands?

A slowlog-log-slower-than

B slowlog-min-time

C slowlog-threshold

D slowlog-time-limit

The parameter slowlog-log-slower-than sets the minimum execution time in microseconds for commands to be logged.

Explain how to use the Redis slow log to find and analyze slow commands.

Think about commands that take too long and how Redis helps you spot them.

Describe the steps to reset the Redis slow log and why you might want to do it.

Consider cleaning up old data to focus on new performance issues.