23c free - new hints
Like every new DB version, with new features there are also new hints in V$SQL_HINT. In 23c free, there are "only" 16 new hints (compared to 21.9) - and of course, they are not in the documentation...
View Article23c free - spfile parameter changes
In the newly Oracle version 23c (available - but not yet production ready) some spfile parameters appeared (and disappeared) in comparison to 21.9. Most of these parameters are undocumented, so it will...
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23c free - SQL History
One new feature in 23c is the SQL History Monitoring and Reporting. If enabled (SQL_HISTORY_ENABLED => TRUE), it provides information about the last 50 SQL statements of a session. This only...
View Article23c free - DBMS_USERDIAG
In Oracles 23c free Database, among other new packages which still need to be discovered, there is one which warms my heart. It's called DBMS_USERDIAG. Unfortunately it is not documented yet - this...
View Article23c free - new events
Oracle 23c database has a lot of new features. Of course there are also a lot of new wait events. There are 212 new events (in comparison to...
View Article23c free - new statistics
Oracle is counting hundreds of events - both on system and session level - they are called statistics. They can provide significant information about the pasts activities - especially when deltas are...
View Article23c free - error messages, new and improved
Oracle Database have a high number (24338 as of 23c free) of error messages! Of course, they change over time or version. But for 23c, Oracle promised to improve the meaning of error messages. They...
View Article23c free - PL/SQL to SQL Transpiler - the CBOs area
As I'm checking for new and interesting parts in Oracles 23c free database, the PL/SQL to SQL Transpiler seems to be a very nice feature, and something I'd like to investigate. But before I started my...
View ArticleGoldenGates credentialstore content
Oracle GoldenGate is a software which enables logical data extract and replication among different databases. It's not limited to Oracle but also supports several other databases and even streaming...
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Outer joins - where to filter?
Last week a colleague asked me during a coffee break why sometimes some outer joins does not show lines with NULL values for parents without children. Of course we had no sample schema at hand, but the...
View ArticleCoding with ChatGTP - a first try
A lot is said already about the power and limitations of current AIs like ChatGTP. During a lazy afternoon I wanted to see it's capabilities and limitations in an easy (at least for me to describe)...
View ArticleSOURCE_ROUTE in easy connect plus syntax
I regularly use Oracle connection manager (CMAN) to simplify connectivity to the database in complex IT environments. Normally the network infrastructure between the CMAN host and the target service is...
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small insights how the SQL Translation Framework does it's work
Oracles SQL Translation Framework (STF) is designed to simplify some aspects of migration an application which was written for another relational database to Oracle. The idea is to translate each SQL...
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ASM directories size and age
Automatic Storage Management is a very powerful method of managing oracles datafiles (and some other files as spfile, controlfile, archivelogs, flashbacklogs, ... also). Unfortunately (of for good...
View ArticleSQLcl stores connections - how and where?
Oracles SQLcl has a lot of nice features. One is to store connections (connection_string, username and password - if you choose to). But - as normal - there is little information how and where it is...
View ArticleIdentifying programs which get swapped
Swapping is seen as a nasty effect on modern systems. When the systems performance goes down there is a bunch of scenarios where significant swapping is observed. Unfortunately a root cause is hard to...
View ArticleExaWatcher custom sampler
Oracles ExaWatcher is a nice tool to sample some OS related measurements and keep them for a short period (normally some days) for later analysis. As its name indicates, it exists only on Oracles...
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changes in SQL real time monitor report in 23c free
I like Oracle SQL real time monitor reports as they contain a huge amount of valuable information and can be viewed and transferred very simple. It's content increased over time - and as oracle updates...
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unblock startup triggers
Oracle has a lot of triggering events which enables a lot of useful actions. One of these events is AFTER STARTUP OF DATABASE. The idea is to set some actions whenever a database opens. These can be...
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23c–Fine Grained Locking–Lock Free Reservations - behind the scene
Oracle 23c has a very interesting feature: Lock Free Reservations. There are great posts already which explain this feature, I'm more interested on the activities behind. For this post, please first...
View ArticleThe cost of BIND information in SQL Trace files
Oracle SQL Trace files are a very valuable source of information - especially when it comes to performance analysis. But people often are afraid of the impact of tracing to performance. Luckily,...
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remote external procedure
During the migration of an application from an older AIX onto modern Linux based database, I stumbled across a little issue: The application uses external procedure calls. This is not an issue in...
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reading a LOB in another session
Reading a LOB in Oracle is often quite easy: it's just a column in the query and all the libraries available today are doing the work necessary to make the LOBs content appear in the desired variable....
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Custom parameters in Method-R Workbench
Method-RWorkbench is a leading tool to analyze many aspects of Oracles SQL-Trace files. It can use parameters in its commands and let users fill their values there. In the picture there are even 2...
View ArticleSessionless Transactions - the moving target
Sessionless Transactions are quite new to Oracle. Some might argue this is not true: XA transactions are available since Oracle 7. The new Sessionless Transactions seem to be quite similar to global...
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