Description:
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Recently i have submit a upgrade from version PHP4.2.3 to PHP5.0.4 (last stable version available) and now i have some problems of scability that they didn't happen before.

I establish a connection with a data base with following code:

----

$conn=OCILogon("user", "pass", "bd");

---

And when i submit a query (that it delays 28 seconds approximately, to return 76000 registers) with the function OCIParse, other sessions that they intend to establish connections apparently locks, waiting that query finishes and sometimes i get the following warning:

---

Warning:  ocifetch() [<a href='function.ocifetch'>function.ocifetch</a>]: OCIFetch: ORA-01001: invalid cursor in ... on line 253


Reproduce code:
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$conn=OCILogon("user", "pass", "bd");

$query = "select ...";

$stmt = OCIParse($conn, $query);

OCIExecute($stmt, OCI_DEFAULT);

while(OCI_Fetch($stmt))
{
 OCIResult($stmt, 1);
(...)
}





Expected result:
----------------
Obtain query results

Actual result:
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While the query is running, others sessions locks and sometimes i get the warning: 
---

Warning:  ocifetch() [<a href='function.ocifetch'>function.ocifetch</a>]: OCIFetch: ORA-01001: invalid cursor in ... on line 253