A Linux server with a Tomcat service deployed, with memory and space shortages after running for a period of time

--Previous time items on the busy, period notes are temporary existence of local txt, these days a little time, sorting out, so that later to view;

Linux View memory Usage:
Free-m

To release the cache:
/proc/sys/vm/drop_caches

Error:
-bash:/proc/sys/vm/drop_caches:permission denied
Error use the following command to release the cache:
sudo sh-c ' echo 3 >/proc/sys/vm/drop_caches '

----------------------------------------------------------
Error: Java.io.IOException:No space left on device at Java.io.FileOutputStream.writeBytes (Native Method) at java.io
Log cleanup can be;

--related commands
To view space usage:
Df-k

Clean the Catalina.out file, if the file is in use, be careful not to delete the file directly, otherwise, the file stream will continue to output, resulting in the hidden memory consumption skyrocket!
Logs directory under CD Tomcat
echo "" >catalina.out

--------------------------------------------------------------

A Linux server with a Tomcat service deployed, with memory and space shortages after running for a period of time