Login or Register to Ask a Question and Join Our Community


IP Networking

[solaris]TCP clnt_max_conns testing tuning

 
Thread Tools Search this Thread
Special Forums IP Networking [solaris]TCP clnt_max_conns testing tuning
Prev   Next
# 5  
Old 11-01-2013
I have an m4000 with 6 10GB nics. With link aggregation. We have clnt_max_conns=1. If you have the correct drivers you normally do not need to tweak this. It is meant for a really fast system connected to lots of slower or very remote boxes (with lots of latency) to enable multiplexing. It handles the disparity in local response times. Like multipathing.

Try loading and then measuring:

Maybe the NFS traffic load across systems is not high enough to push the new connection(s). Or your code base is really well-written. Unlikely, I admit. Ours is awful.

So - artificially increase the NFS traffic by writing some threaded code that reads (or writes) many files at one time. Be sure to do something to avoid the effects of local file caching, or what you will really be measuring is not NFS TCP effects. This will not fly on a production box. You should have svc_t waits of 50ms+ (as a guess) if you are really saturating the connection/driver.

IMO, what you want to look at is iostat -xnmz 1 10 - svc_t time, %b, etc.
-- for NFS mounts. iperf is also relevant, BTW. It is a valid tool.

If your before/after change does not impact this kind test, you are wasting your time with the change.
 
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Solaris

Too much TCP retransmitted and TCP duplicate on server Oracle Solaris 10

I have problem with oracle solaris 10 running on oracle sparc T4-2 server. Os information: 5.10 Generic_150400-03 sun4v sparc sun4v Output from tcpstat.d script TCP bytes: out outRetrans in inDup inUnorder 6833763 7300 98884 0... (2 Replies)
Discussion started by: insatiable1610
2 Replies

2. Solaris

TCP listner on Solaris server

Hi, I am having a solaris server. I want to start a dummy TCP listner on UNIX OS on a specific port can anyone please let me know the process. IP ADDRESS: 123.123.123.123 Port: 8010 (1 Reply)
Discussion started by: mayank2211
1 Replies

3. Solaris

Solaris Performance tuning

Dear all, I have a Local zone , where users feel that performance is not good. Is it wise to collect the inputs from the local zone rather than taking from the global zone. And also Can I tune from Global zone , so that it will reflect in local zone. Rgds rj (2 Replies)
Discussion started by: jegaraman
2 Replies

4. Solaris

maxuser - kernel tuning solaris 8

Hi all Seem to have a concurrent processes issue on a server of mine. At peak times, the application vendor reckons we need to up the amount, as it is reaching its limit and preventing any more processes. Looking in /etc/system, nothing has been set, so server is running with default... (2 Replies)
Discussion started by: sbk1972
2 Replies

5. Web Development

MySQL Tuning Tools with mysqltuner.pl and tuning-primer.sh

We have been tuning MySQL lately and I ran accoss two useful tools that you might be interested in: mysqltuner.pl tuning-primer.sh Both of these scripts are quite useful for MySQL tuning. Here is some sample output of mysqltuner.pl >> MySQLTuner 0.9.8 - Major Hayden... (3 Replies)
Discussion started by: Neo
3 Replies

6. Solaris

TCP splicing for Solaris 10

Hi, How can I do tcp splicing in Solaris 10 ? Is there any software for this in solaris 10? Like in Linux there is "tcpsp-0.0.5.tar.gz" from following link: TCPSP Software - an open source TCP splicing implmentation Thanks n please help NeeleshG (1 Reply)
Discussion started by: neel.gurjar
1 Replies

7. Solaris

Locked TCP port in Solaris 10

Hi all I haven't had much experience with Solaris 10 but we've started running into a problem where a process hangs, it is killed and leaves a zombie process. The sysadmins are saying this zombie process is locking a tcp port and not allowing the process to start up. The process is a usually... (5 Replies)
Discussion started by: casphar
5 Replies

8. Solaris

[help] very need help for solaris TCP

hi expert, hi all very need help please advice, i have v890 production server (gateway server) which running on telecommunication application (e.g USSD application) on this few month i have a problem with the connection to application server, for 2 - 3 hours the connection always down and cannot... (0 Replies)
Discussion started by: bucci
0 Replies

9. IP Networking

Solaris 8 on Intel TCP/IP

I have just installed solaris 8 for Intel on one of my machines at home and I have a cable modem connection with a static IP and I am using a linksys cable/dsl router to assign IP's to my machines. I was wondering if any of you guys know the specific files and examples of the files I have to... (2 Replies)
Discussion started by: reggie316
2 Replies

10. IP Networking

configure TCP/IP for solaris 8

Hello, I have 4 unix (Solaris 8) stations need to setup on network. what is a easy way and quick to setup TCP/IP so I can bring it online?. Please advise! (3 Replies)
Discussion started by: phapvn
3 Replies
Login or Register to Ask a Question

LEARN ABOUT ULTRIX

tcp-env

tcp-env(1)                                                    General Commands Manual                                                   tcp-env(1)

NAME

       tcp-env - set up TCP-related environment variables

SYNOPSIS

       tcp-env [ -rR ] [ -ttimeout ] program [ arg ...  ]

DESCRIPTION

       The  input  for  tcp-env  must be a TCP connection.  tcp-env finds out information about that connection, puts the information into several
       environment variables as described in tcp-environ(5), and runs program with the given arguments.

       Usually tcp-env is run from inetd.  It might instead be run from another server that already sets up the right  environment  variables;  if
       PROTO  is  set  to  TCP  when  tcp-env  is invoked, tcp-env assumes that all the other variables are set up properly, and it does not check
       whether the input is a TCP connection.

OPTIONS

       -r     (Default.)  Attempt to obtain TCPREMOTEINFO from the remote host.

       -R     Do not attempt to obtain TCPREMOTEINFO from the remote host.

       -ttimeout
              Give up on the TCPREMOTEINFO connection attempt after timeout seconds.  Default: 30.

SEE ALSO

       tcp-environ(5), inetd(8)

                                                                                                                                        tcp-env(1)