[MP2] How to turn off caching?

[Foo Ji-Haw]

Hi guys,

If I am not mistaken, modperl tends to cache all output until the script 
is completed, then it sends out the page. If I want to (for example) 
print a period (.) back to the browser every second, what do I need to 
do? I tried $| but it does not work.

Thanks in advance for your advice.