# phpman > man > rrdflushcached(1)

[RRDFLUSHCACHED(1)](https://www.chedong.com/phpMan.php/man/RRDFLUSHCACHED/1/markdown)                              rrdtool                             [RRDFLUSHCACHED(1)](https://www.chedong.com/phpMan.php/man/RRDFLUSHCACHED/1/markdown)



## NAME
       rrdflushcached - Flush the values for a specific RRD file from memory.

## SYNOPSIS
       **rrdtool** **flushcached** [**--daemon**|**-d** _address_] _filename_ [_filename_ ...]

## DESCRIPTION
       The **flushcached** function connects to rrdcached, the RRD caching daemon, and issues a "flush"
       command for the given files. The daemon will put the files to the head of the update queue so
       they are written "soon". The status will be returned only after the files' pending updates
       have been written to disk.

       _filename_
               The name(s) of the **RRD** file(s) that are to be written to disk.

       **--daemon**|**-d** _address_
               Address of the rrdcached daemon. If not specified, the RRDCACHED_ADDRESS environment
               variable must be set (see below).  For a list of accepted formats, see the **-l** option
               in the rrdcached manual.

                rrdtool flushcached --daemon unix:/var/run/rrdcached.sock /var/lib/rrd/foo.rrd

## ENVIRONMENT VARIABLES
       The following environment variables may be used to change the behavior of
       "rrdtool flushcached":

       **RRDCACHED**___**ADDRESS**
           If this environment variable is set it will have the same effect as specifying the
           "--daemon" option on the command line. If both are present, the command line argument
           takes precedence.

## AUTHOR
       Florian Forster <octo at verplant.org>



1.7.2                                        2022-03-17                            [RRDFLUSHCACHED(1)](https://www.chedong.com/phpMan.php/man/RRDFLUSHCACHED/1/markdown)