Benjamin Bostow wrote:
> I have a system running RH 7.3. I have recently been concerned about my
> server running out of memory. I added 1GB of memory to my server to see if
> by chance 256 isn't enough. When I first boot up my server the free memory
> is 185324. A run of free a day later gives me the following output:
>
> total used free shared buffers cached
> Mem: 1289408 661136 628272 0 13624 515040
> -/+ buffers/cache: 132472 1156936
> Swap: 2359208 792 2358416
>
> I tried stopping every process individually to find what is taking all of
> the memory. The most I went down was around 10K. Is there any programs that
> will tell me all segments of memory and what program is in it. I have tried
> using top but it only shows me 15 or so pids. Also what is the cached that
> free shows. If this is a kernel thing is there a place where I can place
> what the maximum cache should be or how to clear it.
See those last two entries (buffers and cached). That is how much memory is
being used by the linux caching and buffering data going to/from the hard drive.
This isn't a problem as the kernel will free this memory up for other uses
when needed by other applications and is actually a good thing since you won't
have to go back to the drive to get to that data if it is already in memory.
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