Technical Blog Post
Do we need to restart/recyle db2 after revising/renewing SSL certificate ?
When your SSL certificate is about to expire or already expired you generate/create a new one.
To make this new/revised certificate effective and for DB2 to use it, DB2 needs to be recycled (db2stop/ db2start).
Infocenter link :
Step by step instructions :
Secure Sockets Layer (SSL) support in DB2 for Linux, UNIX, and Windows