on our server which is running Striim, there is 124G RAM allocated. 70G has been set for the max heap size. Why is free memory decreasing on OS while only 5.64G is being used for heap?
[striim@RB-BD-STRIM-NEW ~]$ free -m
total used free shared buff/cache available
Mem: 124741 14936 46681 48 63124 108996
Swap: 3967 0 3967
Is the free memory being used a cache to improve performance?
[root@RB-BD-STRIM-NEW striim]# vmstat
procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----
r b swpd free buff cache si so bi bo in cs us sy id wa st
2 0 0 45412308 2172 66280472 0 0 21 345 72 19 18 4 77 1 0
I noticed as free memory decreases cache memory increases.
The actual free memory is free + cache+ buffers, but we also know that cache and buffers are not free actually, on the other hand; they are reclaimable.
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