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administrative commands can i use besides top for finding the stumbling blocks you mention and taking account the OS is obsolete ?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

bakunin

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LEARN ABOUT OSF1

ldapcd.conf

ldapcd.conf(4)						     Kernel Interfaces Manual						    ldapcd.conf(4)

NAME

       ldapcd.conf - Configuration file for the single sign-on daemon.

SYNOPSIS

       # comment_string parameter: integer identifier: string identifier: "quoted_string,quoted_string,..."

DESCRIPTION

       The  ldapcd.conf file stores the current configuration of the Windows 2000 Single Sign-on daemon (SSO).	The information stored in the file
       is specified when you configure Windows 2000 Single Sign-on and is not normally changed.

       The ldapcd.conf file also contains the default operating parameters for the daemon which you can tune for performance.  You might  need	to
       tune performance if users wait a long period of time for the UNIX server system to respond.

       To tune the Windows 2000 SSO software, use a text editor to modify the values of the caching parameters as follows: The number of open con-
       nections that the caching daemon makes to the active directory.	Increasing the value of this entry opens more connections  to  the  active
       directory,  however  this  consumes more file descriptors and increases the load on the active directory. Typically, 4 connections are ade-
       quate for a workstation and 15 connections are adequate for a server.

	      Default: 4 connections The maximum number of user entries to store in cache.  Increase or decrease this value as the maximum  number
	      of users increases or decreases.

	      Default:	500  entries  The  maximum number of seconds to cache a user entry.  Increasing this value increases performance because a
	      user's entry is readily available in the cache. If you delete a recently used user account, its entry remains in the cache  for  the
	      amount of time specified by this parameter.

	      Default:	900  seconds.  The maximum number of group IDs to cache. Increasing this value increases performance because group IDs are
	      readily available in the cache.

	      Default: 100 group IDs The maximum number of seconds to cache group IDs.

	      Default: 900 seconds

   Using a Revised Configuration
       If you change the value of a cache parameter in the /etc/ldapcd.conf file, you must enter the following command to read the new	configura-
       tion and restart the daemon: # /sbin/init.d/ldapw2k restart

EXAMPLES

       The  following  example	shows  a  typical  configuration  file:  #  connections: 4 pw_cachesize: 500 pw_expirecache: 900 gr_cachesize: 100
       gr_expirecache: 900

       usesasl: 1

       directory: server1 searchbase:  "cn=users,DC=SSO,DC=TWOTEN,DC=COM"  machine_acctname:  emera.ggg.bbb.com  machine_dn:  "cn=emera,cn=comput-
       ers,DC=SSO,DC=TWOTEN,DC=COM"

FILES

       Location of the file.

RELATED INFORMATION

       Commands: ldapcd(8), lw2ksetup(8)

       Windows 2000 Single Sign-On Installation and Administration Guide.  delim off

																    ldapcd.conf(4)