general/3040: mmap is not a good idea for very large files

[Gerald Britton <gb...@mit.edu>]

>Number:         3040
>Category:       general
>Synopsis:       mmap is not a good idea for very large files
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    apache
>State:          open
>Class:          sw-bug
>Submitter-Id:   apache
>Arrival-Date:   Mon Sep 21 21:10:01 PDT 1998
>Last-Modified:
>Originator:     gbritton@mit.edu
>Organization:
apache
>Release:        1.3.1
>Environment:
Linux (RedHat 5.1)
>Description:
mmaping large files causes a severe preformance hit causing severe swapping
and a large speed drop in transmission.
>How-To-Repeat:

>Fix:
Limit mmaping to files under a given size (dependant on the ammount of memory
in the server, though 16M seems to be a good size to me.
>Audit-Trail:
>Unformatted:
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