Speaking at BGOUG 2014 Spring conference

I’ll be speaking at the spring conference of the BGOUG held between 13th and 15th of June. I was a regular attendee of the conference for eight years in a row but since I moved to UK I had to skip the last two conferences. My session is about Oracle GoldenGate – it will cover the basics, components, usage scenarios, installation and configuration, trail files and GG records and many more.

See you there in (more...)

EMDIAG Repvfy 12c kit – troubleshooting part 1

The following blog post continue the EMDIAG repvfy kit series and will focus on how to troubleshoot and solve the problems reported by the kit.

The repository verification kit reports number of problems with our repository which we are about to troubleshoot and solve one by one. It’s important to notice that some of the problem are related so solving one problem could also solve another one.

Here is the output I’ve got for my (more...)

Troubleshooting Oracle DBFS mount issues

On Exadata the local drives on the compute nodes are not big enough to allow larger exports and often dbfs is configured. In my case I had a 1.2 TB dbfs file system mounted under /dbfs_direct/.

While I was doing some exports yesterday I found that my dbfs wasn’t mounted, running quick crsctl command to bring it online failed:

[oracle@exadb01 ~]$ crsctl start resource dbfs_mount -n exadb01
 CRS-2672: Attempting to start 'dbfs_mount' on 'exadb01'

OEM 12c installation fails if parallel_max_servers too high

Just a quick post regarding OEM 12c installation where recently I had to install OEM 12c and during the repository configuration step the installation fails with error:

ORA-12801: error signaled in parallel query server P151

This was caused by a known bug which requires decreasing the number of parallel queries of the repository databases and start over the installation. The database had cpu_count set to 64 and parallel_max_servers to 270. After setting the parallel_max_servers to (more...)

Consider database timezone when created during DST

Not long time ago customer asked me to create new a database and refresh it from production. Nothing special here database was quickly created and then refreshed using network import for few schemas. Few weeks later I’ve been told that the database has a timestamp problem. The date and time were correct but the time zone was different from the production:



Looking back I tried to (more...)