[luau] memory and writes to disk - linux behavior question

[Charles Lockhart]

Ok, I lied.  For some reason I thought most of the memory was free when 
we first power up the system, but it comes up with about 200MB used. 
Seems like a lot, but I don't see anything hogging it all, so maybe it's 
just allocating memory really freely to the processes that are there.

When first start the app, memory usage jumps to about 250MB.  As I 
stream to disk, this increases, until free mem is reduced to about 3MB. 
  According to top, the app is using about 50-60% of the available memory.

After I exit the app, the memory usage jumps down to about 230MB.

The app has several somewhat large ring buffers, but these aren't 
dynamic.  I'm guessing whatever is sucking up the memory as I stream is 
involved with the disk io.  And it doesn't seem to hurt the performance. 
  I don't see any changes in CPU usage, system speed, etc. when memory 
usage finally tops out.

-Charles

Vince Hoang wrote:
> 
> 
> Is the memory freed when you quit the application?
> If so, that suggest application memory leaks to me.
> 
> -Vince
>  > On Fri, Mar 14, 2003 at 07:54:01AM +0000, Charles Lockhart wrote:
 >
 >>Then the application starts doing disk writes. It's streaming
 >>imaging data to disk at sustained rates as high as 30MBPS. I'm
 >>running top to get an idea of what's going on, and I watch the
 >>free memory sink to about 3MB of data free. It seems like the
 >>application hogs all the memory resources available.