Robert Adkins wrote:
Kevin,Okay folks memory used for buffer, and cache is free memory!!! If you need to use it the kernel will discard the buffer.
I am far from an expert in this manner. I was seeing a similar thing happening with my own server. Using the 'top' utility, I didn't see any process gobbling up memory, even over time. The largest process that I had was and still is Squid, which sits at a nice 17M of usage.
The rest of the processes come and go as users logon and off the PDC this server also acts as.
My baseline memory usage is just about 1GB of memory. It stays consistent at that for at least 69 days. (My last uptime, taken down for hardware maintenance not any other reason.)
The most of the memory being used is being used as a buffer roughly 208MB and as Cache roughly 600 MB. Which leaves virtually all of the memory being used on the server accounted for.
example:
root@sflory tmp]# free
total used free shared buffers cached
Mem: 514836 508620 6216 0 112976 218312
^^^^ actual free
-/+ buffers/cache: 177332 337504
^^^^^^ free not counting buffer, and cache
Swap: 1726940 158300 1568640
<Open up a bunch of xemacs, open office, kword....>
[root@sflory tmp]# free
total used free shared buffers cached
Mem: 514836 510444 4392 0 81000 184124
-/+ buffers/cache: 245320 269516
Swap: 1726940 153792 1573148
<close the programs>
[root@sflory tmp]# free
total used free shared buffers cached
Mem: 514836 486992 27844 0 80752 220692
-/+ buffers/cache: 185548 329288
Swap: 1726940 153776 1573164
[root@sflory tmp]# cat /pub/iso/enigma-i386-disc* >/dev/null
<let it run for a while and hit control-c>
[root@sflory tmp]# free
total used free shared buffers cached
Mem: 514836 511492 3344 0 8312 357668
-/+ buffers/cache: 145512 369324
Swap: 1726940 158408 1568532
[root@sflory tmp]#
You are probably experiencing a similar usage of memory. I also typically show no swap file usage, although it does creep up to 12MB and I am unsure why it has done so, since there is always 12MB of RAM shown as free in 'top'.
Does anyone have more information to add here?
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