Hi all:
Below are the first seven lines of the default Messagewall configuration
file taken from a Proventia M10.
processes=2
max_clients=5
max_backends=5
max_per_ip=5
max_message_size=10485760
max_rcpt=25
max_ext_rcpt=25
Again below is part of the sample configuration file that comes with the
firmware
# This is the MessageWall sample configuration file. All
# variables in this file must be uncommented and defined before
# MessageWall will start.
#
#
# The number of processes to create at startup. This option is
# provided to fully utilize machines with multiple processors;
# it should never be set higher than the number of processors in
# your system. Several of the scaling variables (max_clients,
# max_backends, max_per_ip) are per process.
#
processes=2
#
#
# XXXX max_clients needs to be equal to max_backends if multi_backend!=0
#
# The maximum number of clients that messagewall should accept
# per process. Any clients attempting to connect over this limit
# will receive a temporary error instead of a greeting.
#
max_clients=5
#
#
# The number of connections to the backend server to try to keep
# open per process. If no connections are free when we receive
# a message from a client, MessageWall sends the client a temporary
# error indicating that they should try again later.
#
max_backends=5
#
#
# The number of client connections to accept from a certain IP per
# process. Any clients attempting to connect that would go over
# this limit are sent a temporary error instead of a greeting. This
# is a security measure to prevent one user from overwhelming the
# server; it should be set to a small fraction of max_clients
# so that many IPs would be required to deny access to the server.
#
#max_per_ip=5
max_per_ip=5
#
#
# The maximum size, in bytes, of message to accept. This size is
# announcing in the ESMTP SIZE parameter, and messages larger than
# this size are refused.
#
max_message_size=10485760
#
#
# The maximum number of recipients for a given message. According to
# RFC 2821, this should be at least 100. It is usually practical,
# however, to keep it much smaller than this. Users trying to send
# to more recipients will receive a permanent error.
#
max_rcpt=25
#
# The maximum number of recipients for a given message from an
# external MTA. According to RFC 2821, this should be at least 100.
# It is usually practical, however, to keep it much smaller than this.
# Users trying to send to more recipients will receive a permanent
# error. This parameter should be less than or equal to max_rcpt.
max_ext_rcpt=25
As you can read in the block marked in red, the processes parameter should
be set to 1 (one) when the equipment has one procesor. However as shown in
the default configuration file (first seven lines) the parameter is always
set to 2 (two).
Now, my question: ¿What is correct?, and why?
This is very important because it affects the RAM memory allocation when
changing max_clients and/or max_backends parameters.
An answer will be much appreciated.
Thanks and Regards
epo
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