slab and sreclaimable used up most RAM

One of the server few days ago used up almost all available memory.

free -m shows the following:

             total       used       free     shared    buffers     cached
Mem:         31941      31112        828          1        169       1563
-/+ buffers/cache:      29379       2562
Swap:         1023          0       1023

After did some research, issuing the following commands prompted high memory usage on the slab and sreclaimable for the dentry kernel process:

vmstat -m

To free up the memory, i used the following:

sync; echo 3 > /proc/sys/vm/drop_caches

and the result:

             total       used       free     shared    buffers     cached
Mem:         31941        971      30969          1          7        103
-/+ buffers/cache:        861      31080
Swap:         1023          0       1023

Will this permanently resolve the memory issue? i think it will not but will keep monitoring, suspected it was due to recent use of nixstats which caused this memory issue due to frequest SSL request (curl or libcurl).

Leave a Reply

Your email address will not be published. Required fields are marked *