snout
sniff bad smell about performance
What is snout
snout is command line tool to collect system metrics and give you some advice about performance
Usage
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snout is tool to improve your system performance
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Usage:
snout [commands|flags]
The commands & flags are:
help print snout help
version print the version to stdout
--debug switch on debug mode
Examples:
# start in normal mode
snout
# start in debug mode
snout --debug
TIME_WAIT DEMO
+--------------------+--------------------------------+----------------------------------------------------------------------------------+
| SYMPTOM | DESCRIPTION | ADVISES |
+--------------------+--------------------------------+----------------------------------------------------------------------------------+
| TIME_WAIT_TOO_MUCH | tcp connection state | You can reuse tcp connection by set `keepalive` in http client,set |
| | `TIME_WAIT` is too much, | `fastcgi_keep_conn` in php-fpm settings |
| | current amount is 23 | |
+ + +----------------------------------------------------------------------------------+
| | | You can accelerate the `TIME_WAIT` connection recycle by sysctl: sysclt -w |
| | | net.ipv4.tcp_syncookies = 1;sysclt -w net.ipv4.tcp_tw_reuse = 1;sysclt -w |
| | | net.ipv4.tcp_tw_recycle = 1;sysclt -w net.ipv4.tcp_fin_timeout = 30 |
+--------------------+--------------------------------+----------------------------------------------------------------------------------+
Symptom Support
- tcp stack analysis
- disk usage analysis
- inode usage analysis
- network ports usage analysis
Related Project
statfs(df) implement in golang (https://github.com/ringtail/go-statfs)
sysctl implement in golang (https://github.com/ringtail/sysctl)
netstat implement in golang (https://github.com/ringtail/GOnetstat)