08-29-2014
Hi Bibish,
Have had a look back here several times and as this is beginning to intrigue me, I'd like to investigate this a little further.. It has been some time since I worked on AIX, but I did do a fair bit with 5.3 and 6.1 back in the day.
There are some things that you should be aware of, as far as the page and swap goes along with the run queue and the CPU I/O wait. These parameters are heavily interdependent in AIX, quite often giving rise to apparent performance issues where there aren't any.
So having read over a report that I prepared about 30 months ago, for a group of AIX systems with around 15K users - I'd like to clarify a couple of things. These are just simple info gathering steps!
Is there a perceivable degradation in performance when the swapping happens?
Is the problem repeatable in any shape or form?
Does the reboot always clear the problem?
Regards
Dave
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fair(7) BSD Miscellaneous Information Manual fair(7)
NAME
fair -- simple TCP load balancing service
DESCRIPTION
fair is a load balancer for TCP connections. It can be used to distribute incoming connections for SMTP, HTTP or any other TCP service to
multiple hosts, distributing the load as evenly as possible.
fair consists of two daemons. The carrousel is the front-end; it keeps track of back-end hosts and their status, and forwards incoming con-
nections to the back-ends in such a way that the load is distributed fairly. The transponder runs on the back-end hosts, it registers with
the carrousel and sends it status information. The TCP connections forwarded by the carrousel are not sent to the transponder daemons but
are sent directly to the desired service running on the back-end host. Both daemons share a single configuration file.
EXAMPLES
The following example shows how to set up fair to service HTTP connections and to distribute them over back-ends in the 192.168.1.0/24 sub-
net.
The configuration file /etc/fair.conf contains the following:
WorkerService = http
BalancerService = http
AllowUDP = ^192.168.1.[0-9]+$
On www.example.com, the front-end server receiving the incoming HTTP connections, just run:
carrousel
On each of the back-ends run:
transponder www.example.com
SEE ALSO
carrousel(8), transponder(8), fair.conf(5)
Debian GNU/Linux June 1, 2019 Debian GNU/Linux