The Oracle database server uses an aix midrange computer and is used as the level-1 mount point of the nfs client.

The Oracle database server uses an aix midrange computer and is used as the level-1 mount point of the nfs client.

You must master one knowledge point:

In the aix operating system (this problem occurs only in aix, but not in other operating systems), if the aix small machine is used as the nfs client, and the small machine is also the oracle database server, the mount point (for example,/rman) displayed on the df-g is a level-1 directory. If nfs fails (including nfs server downtime, network disconnection between the nfs client and nfs server) will cause an exception in the oracle database on the nfs client (which is a small machine used as the oracle database server): The instance is frozen, new connections cannot be connected.

Therefore, when using nfs, you must use the level-2 directory as the mount point (such as/rman/backup)

 

If the above steps are completed on the running aix server (used as an nfs client, the first-level mount point is mounted and nfs is faulty), how can this problem be solved? The current method can only be to restart the aix small machine, or the oracle database on the aix small machine cannot provide external services.

 

Reference:
Disconnected NFS Mount Point Causes Instance to Hang on AIX (Doc ID 1445600.1)

When NFS Server Is Down. Oracle Server Freezes With No Errors In Alert Log File (Doc ID 1316251.1)