OID Cluster Nodes in HA Spawn Several Established Connections in Each Node at Startup, e.g., 40 Connections from One OID to the Other (Doc ID 2531268.1)

Last updated on OCTOBER 02, 2019

Applies to:

Goal

After starting Oracle Internet Directory (OID) cluster nodes in High Availability (HA), seeing 80 threads established in each node, 40 connections coming from one OID to the other, e.g. from netstat -an command, for example:

TCP    <NODE1 IP ADDRESS>:<PORT>     <NODE2 IP ADDRESS>:<PORT>     ESTABLISHED
TCP    <NODE1 IP ADDRESS>:<PORT>     <NODE2 IP ADDRESS>:<PORT>     ESTABLISHED
...

And 40 connection coming from the second OID to first:

TCP    <NODE1 IP ADDRESS>:<PORT>    <NODE2 IP ADDRESS>:<PORT>    ESTABLISHED
TCP    <NODE1 IP ADDRESS>:<PORT>     <NODE2 IP ADDRESS>:<PORT>     ESTABLISHED
...

So overall 80 threads.

Sequence used:
1. Both OID instances are stopped
2. Start oid1 instance. Check with netstat command shows 0 connections.
3. Start oid2 instance. Check with netstat command shows 80 connections on each node (connections between oid1 and 2).

Noticed 80 connections due to having orclserverprocs=4 for each oid * 2 * orclmaxcc=10 = 80.

Also noticed that new connection requests to OID ldap server does not use them. Instead, a new connection is established.

Why those sessions are created when more than 1 oid is started and what is their purpose? Can this number be increased or decreased?

Solution

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.