Having too many connections could affect performance ? Post: 302991504

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Special Forums UNIX and Linux Applications Having too many connections could affect performance ? Post 302991504 by bakunin on Sunday 12th of February 2017 03:42:32 AM

02-12-2017

Registered User

Quote:

Originally Posted by alexcol

So Could you tell me if below theories could affect Performance ?

I run netstat command and displays more than 102 connections some of them established state, some of them time wait, etc. So the question is having many connections could affect the performance of the application?
If I killed and restart connections would be a good idea to improve performance?
Having one or more Filesystem backups could affect Performance too ?

Many network connections might affect performance, but right now it isn't even established if you have "many" of them. Connections in the stated of "TIME_WAITING" will not contribute to the load at all and your suggested solution of killing and restarting connections would definitely not help at all.

Running filesystem backups could very well degrade performance but if that is the case or not we can't say.

Quote:

Originally Posted by alexcol

T
which administrative commands can i use besides top for finding the stumbling blocks you mention and taking account the OS is obsolete ?

You might want to read this little introduction to performance tuning i wrote. Most of the tools mentioned there should work for you and most of the concepts explained there should apply to your server.

I hope this helps.

bakunin

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imapproxyd

IMAPPROXYD(8)							 IMAP proxy daemon						     IMAPPROXYD(8)

NAME

       imapproxyd - IMAP proxy daemon

SYNOPSIS

       imapproxyd [ -f <config file name> ] [ -p <pidfile name> ]

DESCRIPTION

       This  manual  page documents briefly the imapproxyd command.  This manual page was written for the Debian distribution because the original
       program does not have a manual page.

       UP-ImapProxy proxies IMAP transactions between an IMAP client and an IMAP server. The general idea is that the  client  should  never  know
       that it is not talking to the real IMAP server, but ImapProxy caches server connections.

       ImapProxy was written to compensate for webmail clients that are unable	to maintain persistent connections to an IMAP server. Most webmail
       clients need to log in to an IMAP server for nearly every single transaction; This behaviour can cause tragic performance problems  on  the
       IMAP  server.   ImapProxy  tries  to deal with this problem by leaving server connections open for a short time after a webmail client logs
       out. When the webmail client connects again, ImapProxy will determine if there is a cached connection available and reuse it if possible.

FILES

       By default, UP-ImapProxy reads /etc/imapproxy.conf on startup.  This can be changed by using the -f option

       Unless foreground_mode has been enabled, UP-ImapProxy will write its PID to to a PID-file. It defaults to /var/run/imapproxy.pid,  but  can
       be overridden with the -p option

SEE ALSO

       pimpstat(8),

AUTHOR

       This manual page was written by Jose Luis Tallon <jltallon@adv-solutions.net>, for the Debian GNU/Linux system (but may be used by others).

Dave McMurtrie							   Mar 12, 2004 						     IMAPPROXYD(8)