Bug 19284 - Missing memory in v. 2.2.14-5.0
Missing memory in v. 2.2.14-5.0
Product: Red Hat Linux
Classification: Retired
Component: kernel (Show other bugs)
i686 Linux
medium Severity medium
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Assigned To: Michael K. Johnson
Brock Organ
Depends On:
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Reported: 2000-10-17 16:35 EDT by A. mcleod
Modified: 2007-04-18 12:29 EDT (History)
0 users

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Doc Type: Bug Fix
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Last Closed: 2000-10-17 16:35:32 EDT
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Description A. mcleod 2000-10-17 16:35:30 EDT

Please excuse me if this report is in the wrong place, but 'kernel' was the
most relevant area I could find.  

Top reports that of 128M of ram, 82M are being used when no application
other than top is being used.  

Stranger still, no individual program claims to be taking up this memory.

Free reports the following (while I'm in Xwindows, running netscape &
                   total       used           free     shared      
buffers     cached
Mem:        127788     123444       4344     110052       8416      57164
-/+ buffers/cache:      57864      69924
Swap:       136512        768     135744

What is going on here?  82M used with no apps running doesn't seem right.

Comment 1 Brock Organ 2000-10-17 18:23:32 EDT
that is because of the kernel's buffer cache ... the kernel automatically uses a
portion of unused memory to cache block devices (disks etc.) to improve I/O
performance ... this memory will be released if/when other processes need access
to it ...

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