Re: FATAL: fm->n_files_in_map > fm->max_n_files

From: Henrik Nordstrom <>
Date: Thu, 01 Oct 1998 20:02:52 +0200

Jake Maizel wrote:
> I'm receiving the following error in squid.out w/ squid 1.1.22 on a DEC
> alphaserver 800 5/333 340MB RAM running DEC OSF/1 ver. 4.0D fully patched.
> What's causing this? Any info please email to
> FATAL: fm->n_files_in_map > fm->max_n_files

There are two known causes to this:

a) You cache contains mostly very small objects, pushing the average
object size below store_avg_object_size / 2.
Fix: reconfigure store_avg_object_size in squid.conf to a smaller value
(use cachemgr to check your current value). The penalty from configuring
it to low is a slightly higher memory use.

b) You have a very small cache, and a very busy Squid.
Fix: Increase the cache size, and configure a smaller expected average
object size.

Henrik Nordström
Received on Thu Oct 01 1998 - 11:15:07 MDT

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