What’s New In Oracle Database 19c

What’s New In Oracle Database 19c

19c is confirmed as Lengthy Time period Help model, with main assist no less than to 2022 and extended support to 2025. Note that in Oracle Cloud, prolonged help is with out additional fees.
If you are nonetheless in 11.2.0.four because you don’t want frequent upgrades, 19c will be the launch to go (but keep it updated with Launch Updates). If you wish to make sure you do this upgrade as quickly as 19c is available on premises, then higher to test it as soon as potential and report any bug you encounter. This means:
enter the beta program. Having a beta program for a launch centered more on stability than new features is an awesome resolution from Oracle Development.
test 19c in Oracle Cloud as quickly as available. You could use more options than what you have on-premises for those tests, such because the Performance Analyzer.


he massive new thing, in my view, is that the Java One conference has been merged to Oracle Open World conference, and renamed to Oracle Code One. Interleaving Dev and Ops sessions is a really good idea. The Oracle Technology Network (OTN) which grew to become Oracle Developer Community (ODC) is now becoming the Oracle Groundbreakers. What I like right here is that there isn't any mention of technology or development. We're all in the same project: enhance the person experience with all of the application elements, from system to code.

This was additionally the occasion to offer a talk more targeted at builders than at DBA. On the time of Microservices, I wished to share my expertise in Dev and Ops teams, on monolithic, consumer/server, 3-tiers,… architectures. Because segregation of responsibility is great at logical degree, however the way to efficiency and scalability must typically undergo colocation in same server, process, engine…

In this speak, I discussed Oracle XE which could be embedded for free. The 18c model of XE was released Saturday throughout the ACED Briefing. Rather a lot larger than the 11g however with more options. Compression is a crucial one because the storage is restricted to 12 GB.
19c new Optimizer features
One of the best you are able to do for the optimizer is providing accurate statistics. Every day gathering on stale tables will not be enough, and dynamic statistics overload parse activity too much. We will have new features:
High Frequency Automated Statistics Task: some statistics gathering will probably be accomplished in the course of the day, when the system is idle, controlled by the Useful resource Manager.
Real-Time Statistics: some statistics (like high/low worth) are maintained during DML. This might be nice to avoid Out-of-Range problems with linear decay from out of date statistics.
We should not rely on hints, but generally, we need. And we want to make certain that they're used (because no error is raised when not).
Hint Usage Reporting: dbms_xplan reports the hints per operation and alias name, with a sign for those that weren't used (and reason)
Speaking about DBMS_XPLAN, the comparability of plans have improved:
Examine SQL Execution Plans: shows directly where the plan diverges
At execution time, when a question never ends the worst that can happen is that the impatient run it again. That’s a good suggestion, however all of us do that on Web applications: no answer -> hit F5 several times. The question won't run quicker and this only increases the contention. Then, higher to cancel the statement (useful resource manager can do this) and quarantine the bad execution plan:
Automatic Diagnostic and Repair and Quarantine for Runaway Statements
Of course, the big function for the 19c Autonomous Transaction Processing cloud service is Computerized Indexing. This deserves a longer description. The brief concept is that a background job will capture and analyze the workload on brief-term (last 15 minutes) to add better indexes, oracle 18c classes removes them, or blacklist them (SQL Patch) for some queries.
And the function I like the most:
Automatic SQL Plan Administration: the capture shall be computerized
Enabling the capture for all statements executed two times just isn't easy, even with the new filters introduced in the latest release. Here, the capture depends on AWR. When a question is long, the execution plan might be compared with past AWR snapshots. And if a better plan was used previously, then this one would be the accepted SQL Plan baseline. This is what we do manually, isn’t it?

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