---
name: "flashstat"
section: "8"
platform: "linux"
package: "flashcache-utils"
version: "3.1.3+git20150701-5"
release: "Debian 9 (Stretch)"
platforms: ["linux"]
url: "https://new.carta.tech/flashstat"
---

# flashstat(8)

Display flashcache statistic information

## NAME

flashstat - Display flashcache statistic information

## DESCRIPTION

The purpose of the **flashstat** command is to periodically display flashcache statistic information

## SYNOPSIS

flashstat \[-h\] \[-i \<time Interval\>\] \[-C \<count\>\] \[-d \<device\>\] \[-n\]

## OPTIONS

- **-h, --help**

  Print help info

- **-i, --interval**

  Time(second) interval, the default value is 1s

- **-C, --count**

  Display times

- **-d, --device**

  Flashcache device, the default device is /dev/mapper/cachedev

- **-n, --nocolor**

  No color mode

## OUTPUT

read/s - reads per second for cachedev

write/s - writes per second for cachedev

diskr/s - disk reads per second

diskw/s - disk writes per second

ssdr/s - ssd reads per second

ssdw/s - ssd writes per second

uread/s - uncached reads per second

uwrit/s - uncached writes per second

metaw/s - metadata ssd writes per second

clean/s - cleanings per second

repl/s - replacement per second

wrepl/s - write replacement per second

hit% - read hit percent(current hit%\|total hit%)

whit% - write hit percent(current whit%\|total whit%)

dwhit% - dirty write hit percent(current dwhit%\|total dwhit%)

## SEE ALSO

*README* and other documents in **/usr/share/doc/flashcache-utils**

The flashcache source code and all documentation may be downloaded from \<https://github.com/facebook/flashcache/\>.

## AUTHORS

Flashstat is developed by NinGoo \<seaman.ning@gmail.com\>

This man page was written by Liang Guo \<guoliang@debian.org\> for Debian GNU/Linux (but may be used by others).