Virtual circuit wait on XDB

Question

Hello,
I'm facing a problem, I can't get behind...
I've created a PL/SQL Package that generates a HTML page with the package procedure "HTP.PRN" in a Ora11gR2 DB.
Everything works fine. A client with IE or Firefox can access the HTML page without any problem by calling url
http://<db-servername>:8080/<DAD>/<Package_Name>.<Procedure_Name>
But when a second client tries to call the same page, it has to wait for approx a minute until the page will be shown in the browser.
During this time, I can see in dbconsole, that there is a massive peak for "virtual circuit wait" events. After loading the page in IE
"virtual circuit waits" run against zero again.
I've tested this now on ORA 11GR2 on a Windows and a Linux box. On both machines, there is the same behavior.
The listener.ora looks like this (on Windows box):
# listener.ora Network Configuration File: D:\oracle\product\11.2.0\JAAP\network\admin\listener.ora
# Generated by Oracle configuration tools.
SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = CLRExtProc)
      (ORACLE_HOME = D:\oracle\product\11.2.0\JAAP)
      (PROGRAM = extproc)
      (ENVS = "EXTPROC_DLLS=ONLY:D:\oracle\product\11.2.0\JAAP\bin\oraclr11.dll")
LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
      (ADDRESS = (PROTOCOL = TCP)(HOST = rrottlaender02.seepex.local)(PORT = 1521))
ADR_BASE_LISTENER = D:\oracle
Any hint, showing me the rigth direction, would be great!
Thank you in advance...
Ciao,
Roland

Answer 1

Increase the amount of SHARED SERVERS via an ALTER SYSTEM statement
SQL> show user
SYS
SQL> alter system set shared_servers=5 scope=both;