dbi services Blog
Welcome to the dbi services Blog! This IT blog focuses on database, middleware, and OS technologies such as Oracle, Microsoft SQL Server & SharePoint, EMC Documentum, MySQL, PostgreSQL, Sybase, Unix/Linux, etc. The dbi services blog represents the view of our consultants, not necessarily that of dbi services. Feel free to comment on our blog postings.
In this blog post I want to sharing some useful DQL and IAPI queries that I am using all the time. They are more dedicated to Documentum support/debug and grouped by components. In order to use them, I recommend Qdman: it is the best tool I know to use DQL and IAPI scripts.
Have you noticed an interesting behavior with SQL Server 2014 when you are running a dbcc checkdb command? If not, you should have a look at this blog post. I discovered it completely by accident during some tests. If you watch carefully, you will see "weird" files appear while the dbcc checkdb command is running.
When an Oracle Database spends a high percentage of its DB time in User I/O, I usually check the wait event histograms in order to see if the storage system is working well. But today, with storage going to SSD, most I/O are less than 1 milliseconds and we have no details about those wait times.
During my audits at customer places, it still happens very often to find SQL Server databases with page verification option configured to "none". I always alert my customers on this configuration point because it can have an impact on the overall integrity of their databases. One of my customer told me that the integrity task of its maintenance will detect the corruption anyway and alert him by email - but is it really the case?
As you certainly know SQL Saturday events are very popular in SQL Server world community. This is the second time the event takes place in Paris (France), but this time, we have a new format with pre-conferences on Wednesday and classic sessions on Saturday. During pre-conferences, we will talk about a particular subject for a whole day.
Do you remember last year, when 12c arrived with multitenant, David Hueber warned us about the fact that a single PDB can, under certain conditions, generate a complete system downtime? We are beta testers and opened a SR for that. Now one year later the first patchset is out and obviously I checked if the issue was fixed. It's a patchset afterall, which is expected to fix issues before than bringing new features.