Oracle

Beware the /var/tmp/.oracle Hidden Directory!

A few months ago, we had a test instance complaining that it couldn’t write to ASM. This was an 11.1.0.7 single (non-RAC) instance on Oracle Enterprise Linux 5, using ASM for the storage.We ended up booting the server altogether, after which everything came up nicely. We filed an SR with Oracle Support, who directed us to Note 391790.1 (Unable To Connect To Cluster Manager Ora-29701). This note lists the cause, quite simply, as…

ODTUG Kscope Wrap-up and Slides

Ronald Bradford and I produced a successful MySQL track at Kaleidoscope (hereinafter referred to as Kscope). With a speaker list of Philip Antoniades, Josh Sled and Craig Sylvester of Oracle, Laine Campbell of PalominoDB, Patrick Galbraith of Northscale, Sarah Novotny of Blue Gecko, Padrig O’Sullivan of Akiba, Dossy Shiobara of Panoptic.com and Matt Yonkovic of Percona, we knew the technical content was going to be great.

ODTUG Kaleidoscope 2010: Best Practices

For me, ODTUG Kaleidoscope 2010 started on Friday with the ACE Directors briefing. Best practices topic was touched there slightly and I twitted about it. I decided that the feedback deserves a blog post so I’m simply quoting the conversation here. If you have anything to add, you know where to find the comment box.

MySQL and Quoting

MySQL does not follow the ANSI SQL standard for quoting. MySQL’s default quoting behavior is that either single or double quotes can be used to quote a string (this gets me into trouble when I work with Oracle databases, as double quotes do not indicate a string!).

ODTUG Kaleidoscope 2010 — Ready… Set… Go-o-o!

I just arrived and right in time for the Oracle ACE Directors’ briefing that will run for the whole days of Friday. This is a super secret meeting where Oracle’s super secret plans are shared. The ACE Director’s briefing is where Oracle shares the roadmap of its products — some of it is long term strategy and some is about the upcoming releases.

Next Week’s MySQL Sessions at ODTUG Kaleidoscope

By now you know that there is a MySQL Track during next week’s ODTUG Kaleidoscope in Washington, DC. Ronald Bradford and I organized the schedule at the last minute (Ronald did a lot of the work!). It was difficult to fill a schedule with 19 sessions that are either 1 hour or 1.5 hours long, and to do it I ended up with three presentations. At each presentation I will be giving away a copy of The MySQL Administrator’s Bible, so be sure to show up! All MySQL track sessions are in Maryland C, and all times are Eastern.

Oracle’s OPT_ESTIMATE hint: Usage Guide

Many have expressed the deepest desire to see OPT_ESTIMATE documented, but that never happened. I’ve just troubleshot a problem and used this hint a lot during my “what if” scenario testing, and found this hint to be quite useful. Thus, I decided to document it here on the blog. I will come back and update this blog as I discover new parameters, and feel free to suggest what you’ve found in the comments. If you can, include an example to illustrate usage.

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