02-12-2017
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administrative commands can i use besides top for finding the stumbling blocks you mention and taking account the OS is obsolete ?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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LEARN ABOUT CENTOS
pmdapmid
PMDAPMID(3) Library Functions Manual PMDAPMID(3)
NAME
pmdaPMID - translate a dynamic performance metric name into a PMID
C SYNOPSIS
#include <pcp/pmapi.h>
#include <pcp/impl.h>
#include <pcp/pmda.h>
int pmdaPMID(char *name, pmID *pmid, pmdaExt *pmda);
cc ... -lpcp_pmda -lpcp
DESCRIPTION
As part of the Performance Metrics Domain Agent (PMDA) API (see PMDA(3)), pmdaPMID is the generic callback for translating a dynamic metric
name into a PMID (pmid).
Because implementing dynamic performance metrics requires specific PMDA support, and the facility is an optional component of a PMDA (most
PMDAs do not support dynamic performance metrics), pmdaPMID is a skeleton implementation that returns PM_ERR_NAME.
A PMDA that supports dynamic performance metrics will provide a private callback that replaces pmdaPMID (by assignment to version.four.pmid
of the pmdaInterface structure) and implements the translation from a dynamic performance metric name into the associated pmid.
DIAGNOSTICS
pmdaPMID returns PM_ERR_NAME if the name is not recognized or cannot be translated, else returns 0.
CAVEAT
The PMDA must be using PMDA_PROTOCOL_4 or later, as specified in the call to pmdaDSO(3) or pmdaDaemon(3).
SEE ALSO
PMAPI(3), PMDA(3), pmdaDaemon(3), pmdaDSO(3), pmdaMain(3) and pmLookupName(3).
Performance Co-Pilot PCP PMDAPMID(3)