Experimental Physics and
Industrial Control System

Dear all,

 

In our Debian 10 environment, when Archiver Appliance runs for quite a while, the buff/cache memory will become very high. For example, in the virtual machine with 64GB memory, when Archiver Appliance is up for 14 days, 24GB memory is used, whereas 39GB memory are buff/cache and there is only 400MB free memory left as follows.

 

MiB Mem :  64422.7 total,   398.7 free,  24700.1 used,  39323.9 buff/cache

MiB Swap:   7629.0 total,   6227.7 free,   1401.2 used.  38838.9 avail Mem 

 

Probably it is not a problem since Linux buff/cache will be freed when other applications need memory. However when buff/cache is too high and free memory is too low, the whole Linux OS seems to be very slow.

 

I would like to hear about experiences from other sites. Is it necessary to deal with this situation or not? If yes, what is the recommended way to reduce or clear the buff/cache memory?

 

 

Thanks,

Lin