OCI8

I've been using the OCI8 extension and have a question about the Persistent Connections. While debugging the site, I will run into the following error (paraphrased): BeginSession: too many processes running etc... I have my scripts setup in the following way: <?php OCIPLogon(...); stuff ?> I never do call OCILogOff(...) explicitly. I may misunderstand, but I thought when a call to a persistent connection is made, it will first look for an open session and use it. Otherwise, it creates a new one. This correct? What causes this "overload" of sorts? Is it PHP or Apache? Win2k Apache 1.3.20 PHP 4.1.0 Thanks in advance for your help RDB