Info about configuring queuespace?s size in Tuxedo 6.5

Question

Hi
I am looking for infomation about how I can calculate the size of a Tuxedo/Q
queuespace. What are the parameters that I have to analyze in order to make a
good "setting"?
Merci

Answer 1

Well,
What about:
SUM(i = 0; i = n){QUEUE(i) size}
where
QUEUE(i) size
is the size of a particular queue in your queue space.
Now I hear you say: "But what's then a good size for a queue?" (a GOOD question)
That depends on:
- the number of messages enqueued per unit of time
- the average size of the messages
- the amount of spare capacity you want to have (how long before the queue gets
filled up completely if no messages are being read from it)
The bottom line is: you have to think about it and maybe ask users what would
be acceptable for them. If a Service Level Agreement requires that messages can
be stored for 2 days then you'd better make sure that you can handle it.
Example:
- 100,000 messages/day
- average message size 2 kb
- must be able to handle 12 hours of messaging before queue is completely filled
up
Then the queue size is 100,000 * 12/24 * 2kb = 100,000 kb = 100 Mb.
Add another 30% engineering margin and you will need 130 Mb for this queue.
Admitted: this is a very rough calculation.
Remarks:
- disk space is relatively cheap
- the size of the individual queues determines the size of the queue space you'll
need
- you don't want to administer the queues on a daily basis if they appear too
small (time and again if you're a real Scrooge)
- really big queue spaces may take some time to be initialised by TUXEDO, but
that's only at creation time
Bottom line: use your common sense.
Regards, Winfried Scheulderman
"Marcos Lyra" <[email protected]> wrote:
>
Hi
I am looking for infomation about how I can calculate the size of
a Tuxedo/Q
queuespace. What are the parameters that I have to analyze in order to
make a
good "setting"?
Merci