I’m at Collaborate 08 in Denver right now.My presentation, Oracle 11g New Features Out of the Box, was originally scheduled on Thursday at 9:45 AM but due to participation in the speaker panel ,”To RAC or Not To RAC: What’s Best for HA?”, it was rescheduled to today, Wednesday, at 4:30 PM. I’m off to the Carol Dacko’s presentation about DBMS_XPLAN now and looking forward to show up at the RAC SIG Birds of a Feather later today. Stay tuned – more to come…
I recently implemented OID/SSO with E-Business Suite 11.5.10 CU2, and experienced some issues after the entire setup went smoothly. I hope this note might help others troubleshoot, as it took me a while to figure out the root cause of the problem.
Reading PlanetMySQL today, I discovered that Alex Gorbachev’s announcement that he has released the first public beta of his Oracle Grid Control plugin for MySQL was not aggregated! Knowing that my feed is aggregated, and not willing to let this news and this amazing work go unnoticed by the MySQL community during the conference (I am at MySQLConf listening to Amazon.com’s CTO speak right now!) you can access the update here.
sec p, dsk p, gets p, rows p, cpu p — these are average statistics for the query being executed. This should give you a quick overview of whether the query is a big query, a small query, a CPU-intensive or a disk I/O-intensive query. Be careful: since the query was introduced to the shared pool, those columns are averages, and therefore could be misleading. These are all per execution stats, so sec p represents the number of seconds on average it took to execute the query.
has finally happened! The first public release of the MySQL plug-in for Oracle Enterprise Manager 10g Grid Control is out. In the last few months, more and more people showed interest in the potential plug-in, and even few guys from Oracle contacted me independently of each other with their own reasons to have a MySQL plug-in available. This interest accelerated the fermentation of thoughts in my brain, and I got down to work. Pythian generously sponsored my development time. Here are the details. The first release version is 0.42 because that’s obviously the perfect number to start something good.
Welcome, readers, to the 92nd Log Buffer, the weekly review of database blogs.
We all have encountered this situation many times before: the cost-based optimizer assumes no correlation between two columns (until 11g), and this has the effect of erroneously reducing the cardinality of a row source. Incorrect cardinality estimates are one of many root causes for SQL performance issues. Consider the following example.
After setting up dg4odbc to connect to a SQL Server database (read ‘Tips on Using dg4odbc on 64-bit Linux’), I spent last week trying to get refreshes of materialized views to work in 11g, using the same DDL as in 8i. So, to those three tips, I now add #4: check the statements that use a WHERE … IS NOT NULL across the remote database link to ANSI-compliant databases.
Since the introduction of ASM in Oracle 10g Release 1, every ASM administrator has been dreaming of a simple command line tool to copy files between ASM diskgroups and other filesystems. Oracle ASM 10g Release 2 added the handy asmcmd utility, but even though everyone expected a copy command there, it had not been implemented. While working on a Collaborate 08 presentation on Oracle 11g new features out-of-the-box, I was verifying new commands in Oracle ASM 11g’s asmcmd utility. It turned our that copying files from or to ASM is still a problem.
Ever wished the listener.log file was a table in the database? Wish no more! About three years ago, I sent this recipe in an email to my co-workers. Just recently, Shakir re-sent it after using the method in an emergency. Since it seems to have proved its value, I now offer it to our readers. Have a look.