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Full Discussion: Having too many connections could affect performance ?
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
Old 02-12-2017
Quote:
Originally Posted by alexcol
So Could you tell me if below theories could affect Performance ?
  1. 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?
  2. 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administrative commands can i use besides top for finding the stumbling blocks you mention and taking account the OS is obsolete ?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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LEARN ABOUT NETBSD

pmc

PMC(1)							    BSD General Commands Manual 						    PMC(1)

NAME

     pmc -- performance-monitoring counter interface for command execution

SYNOPSIS

     pmc -h
     pmc -C
     pmc -c event command [options ...]

DESCRIPTION

     pmc is a means of using a processor's performance-monitoring counter (PMC) facility to measure various aspects of a program's execution.  It
     is meant to be used in a fashion similar to time(1).

     The arguments are as follows:

     -h      Display a list of performance counter events available on the system.

     -C      Cancel any performance counters that are currently running.

     -c event
	     Count the event specified by event while running the command.

DIAGNOSTICS

     PMC support is not compiled into the kernel  Performance-monitoring counter support has not been compiled into the kernel.  It may be
     included using the PERFCTRS option.  See options(4) for details.

     PMC counters are not supported by CPU  Performance-monitoring counters are not available for the CPU.

SEE ALSO

     time(1), options(4)

HISTORY

     The pmc command first appeared in NetBSD 1.6.

AUTHORS

     The pmc command was written by Frank van der Linden <fvdl@wasabisystems.com>.  The kernel support for reading performance counters on the
     i386 architecture was written by
     Jason R. Thorpe <thorpej@zembu.com>.

BUGS

     The pmc command currently only supports performance-monitoring counters on the i386 architecture.

BSD
								 October 24, 2000							       BSD
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