redis slowlog enable disable view logs keys examples

Table of Contents

Enable Disable redis slow log

nano /etc/redis/conf

slowlog-log-slower-than =1000

heck redis slow logs

slowlog-log-slower-than 10000

# There is no limit to this length. Just be aware that it will consume memory.

# You can reclaim memory used by the slow log with SLOWLOG RESET.

slowlog-max-len 128

The following time is expressed in microseconds, so 1000000 is equivalent

# to one second. Note that a negative number disables the slow log, while

# a value of zero forces the logging of every command.

slowlog-log-slower-than 10000

Save files

>> redis performance tuning

Restart redis server

Service redis-server restart

Enable disable slow log in Redis cli

127.0.0.1:6379> config set slowlog-log-slower-than 15000

Check slow log memory limit

config get slowlog-max-len

127.0.0.1:6379> config get slowlog-max-len
1) “slowlog-max-len”
2) “128”

slowlog-max-len 128

Change redis slow log length

config set slowlog-max-len 64

127.0.0.1:6379> config set slowlog-max-len 64
OK

Check redis slow log status

config get slowlog-log-slower-than

127.0.0.1:6379> config get slowlog-log-slower-than
1) “slowlog-log-slower-than”
2) “10000”

Check slow logs in command line

slowlog get 2

127.0.0.1:6379> slowlog get 5
1) 1) (integer) 12
2) (integer) 1620823964
3) (integer) 10166
4) 1) “GET”
2) “w3tc_1554539083_lichelps.co.in_0_object_0optionsalloptions”
5) “127.0.0.1:6016”
6) “”
2) 1) (integer) 11
2) (integer) 1620811264
3) (integer) 27686
4) 1) “GET”
2) “raazwp_b3vaaca4kz:options:alloptions”
5) “127.0.0.1:16104”
6) “”
3) 1) (integer) 10
2) (integer) 1620738752
3) (integer) 22188
4) 1) “GET”
2) “raazwp_b3vaaca4kz:options:alloptions”
5) “127.0.0.1:57556”

1srt: unique ID

2: timestamp

3rdone: execution tome in microseconds = 221ms ideal 100ms Average should be 40ms.

good 20 ms depends query key size 512MB.

4: array of command type

5 Port

Problem: Redis slow log: 150 – 400 ms in average load

mitigating:

Disabled RDB , AoF (50% reduced work)

Disable Slow logs (some benefit)

Key Size: largest one 13143 bytes = 13/kB

No latency: local host

latency monitor also not given any bad result.

Reference:

how fast is redis

Redis latency