Re: how many listeners to run?

Hey Li,

You may want to check out Metalink 67983.1, specifically for the QUEUESIZE parameter for the listener.ora file.

A few scripts to use regular old SQL*Plus to throttle a Listener isn't terribly difficult to write in Korn or Bash. At it's simplest, something like:

• Script 1 ("sqlconn.sh"): sqlplus joedba/mypass_at_test /nolog
• Script 2 ("hammer_listener.sh"): i=-1 while [ $(( i += 1 )) -lt 1000 ] do nohup ./sqlconn.sh & done

This is completely untested, of course. While not very robust, I hope it's self-explanatory!

HTH! GL! Rich

> Thank you all very much for taking your time to respond! I tend to
> agree with Freek D'Hooge to keep it simple and just use 1 listener and
> if I need to stop 1 application, I stop the corresponding database
> service of that application. My only concern with 1 listener is if it
> will be fast enough to respond to all the connection requests from the
> clients of all 4 databases not becoming a bottleneck. Any comment on
> here?
>
> Also, I have a dumb question in here. If you do multiple listeners,
> how do you prevent 1 database automatically registers itself to all
> the running listeners? ie, how do you setup database A only registers
> itself to listener A, database B only registers itself to listener B?
>
> Thanks again!
> -Li

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