Startup

Oracle 18.4.0 installation on AIX may fail with ORA-40238

Oracle 18.4.0 for IBM AIX is available since mid November 2018. But I’ve received several emails from people saying that Oracle 18.4.0 installation on AIX may fail with ORA-40238. And it’s true, this can happen. But there’s a simple workaround which unfortunately is not in the documentation yet. We’ll take care that it will be added soon.

Oracle 18.4.0 installation on AIX may fail with ORA-40238

Oracle 18.4.0 installation on AIX may fail with ORA-40238

First of all, this is an error pattern you may see on IBM AIX only. You may receive the following error message either during installation or startup of ASM or any … [ Read more ]

Starting up 252 PDBs automatically?

In my recent posting I have explained the startup of many PDBs at the same time.

But once you startup the container database CDB$ROOT the PDBs will stay in MOUNT status. So how do you start them during CDB$ROOT startup (or immediately afterwards) in an automatic fashion?

A startup trigger will do this job.

CREATE OR REPLACE TRIGGER startup_all_pdbs
AFTER STARTUP ON DATABASE

BEGIN

EXECUTE IMMEDIATE ‘ALTER PLUGGABLE DATABASE ALL OPEN’;

END;

/

And of course you can use the EXCEPT command option to exclude one or more PDBs from the automatic startup.

CREATE OR REPLACE TRIGGER startup_all_pdbs_except_a_few
AFTER STARTUP
[ Read more ]

Starting up 252 PDBs in Oracle Multitenant

What happens when you start up 252 PDBs (Pluggable Databases) with the Oracle Multitenant Option for the first time?

Interesting question, isn’t it? The expectation would be that this will happen within seconds as the SGA and therefore the shared memory segments are already allocated from within the CDB$ROOT (Container Database). But …

The following happens:
It takes minutes … hours …. In my tiny lab environment with just as little as 20 PDBs due to space constraints it takes over 30 minutes to startup 21 PDBs. Takashi Ikeda from Fujitsu Hokoriku Systems who did a great demo with the … [ Read more ]