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administrative commands can i use besides top for finding the stumbling blocks you mention and taking account the OS is obsolete ?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 HPUX
loratune
loratune(1M) loratune(1M)
NAME
loratune - initiate LORA tuneup to improve alignment of processing resources
SYNOPSIS
DESCRIPTION
The command improves the performance of an HP-UX system in LORA (Locality-Optimizated Resource Alignment) mode, by triggering the kernel to
do optimization tuning of the system and application memory.
The command may return before the tuning is complete. This tuning can continue in the background for several minutes after the command
returns. If the command is interrupted, or the command process is otherwise terminated, no subsequent tuning operations will be initiated,
but those in progress will continue until completion.
When no options are specified, all locality domains are tuned.
Options
This option limits the tuning to the locality domain specified by
lid.
Application Usage
In Locality-Optimized Resource Alignment (LORA) mode, performance of applications may improve when their processors and the memory that
they use are aligned in the same locality. The HP-UX kernel attempts to maintain such alignment at all times, but it is possible for mis-
alignment to occur when the system workload transitions significantly. If that happens, the command can be used to reestablish alignment
and improve application performance.
Here are some examples of workload transition events that may cause misalignment of processing resources:
o Starting or terminating an application that consumes a large amount of processor or memory resources.
o The workload demand surges far above the normal level and then recedes.
o Dynamic platform operations that add or subtract processor or memory resources from the operating system's control.
If one of those events has occurred, and application performance is not as high as it can be, then it is appropriate to invoke the command.
RETURN VALUES
The command returns a 0 when successful, and a non-zero value when unsuccessful.
ERRORS
The command will not initiate any tuning and will return a non-zero value if the user does not have appropriate privilege.
WARNINGS
The command can consume a significant amount of system processing resources to restore optimal alignment. Ideally, the command should be
invoked prior to the time when performance is critical, not during the time when performance is critical. The command should be invoked
after the workload transition is complete, not during workload transition. Although tuning can continue in the background for several min-
utes, it is not necessary to wait any more than five minutes between invoking the command and launching new applications.
EXAMPLES
If eight instances of SAP were running in localities with locality domain identifiers 4 and 5, and four of those instances were shut down,
then it would be appropriate to tuneup the remaining four instances. An example command would be:
If an HP-UX system in LORA mode had one of its cells deactivated, then it would be appropriate to tuneup the entire system. An example
command would be:
AUTHOR
was developed by HP.
SEE ALSO
mpsched(1), numa_policy(5), lora(7).
Itanium(R)-based Systems Only loratune(1M)