Hi All,
Every day multiple time physical memory utilized by cached. and only after manual clearing its releasing. Verified running process, but all process utilizing only 0.1/0.2 %Mem.
Can anyone help me to identify the issue.
Additional info
free -g
total used free shared buffers cached
Mem: 47 46 0 0 0 42 -->> 42 GB physical mem used by cache
-/+ buffers/cache: 3 43
Swap: 1 0 1
Server last rebooted 128 days back.
@Araind Hi and welcome to the Forum 
What release of SLES is this? cat /etc/os-release On SLES 15 SP1 I see in the last column available not cached, second to last is buff/cache.
Thank you for your response .
Please see below details.
#cat /etc/os-release
NAME=“SLES”
VERSION=“11.4”
VERSION_ID=“11.4”
PRETTY_NAME=“SUSE Linux Enterprise Server 11 SP4”
ID=“sles”
ANSI_COLOR=“0;32”
CPE_NAME=“cpe:/o:suse:sles:11:4”
+++++++++++++++++++++++
After executing below command manually cached usage comedown to “0”
#sync; echo 1 > /proc/sys/vm/drop_caches
++++++
Above operations we have done multiple times from past two days on Prod server to support App’s team job to run.
Current utilization as below
free -g
total used free shared buffers cached
Mem: 47 13 33 0 0 8
-/+ buffers/cache: 3 43
Swap: 1 0 1
Cached will occupy 48G in within short period and then App team can’t execute any job.
How to identify why it’s filling up ?
Any permanent fix we can apply ?
typo error
Cached will occupy 46GB within short period of time and then App team can’t execute any job.
@Araind Hi, I suggest opening a Support Request for this issue, mainly because it’s an old release, hopefully you have LTSS support?
I have opened support request and they have give only workaround not permanent fix.
Like add cronjob entry to drop cache ,.