What’s New In Oracle Database 19c
19c is confirmed as Lengthy Time period Assist version, with major assist at the least to 2022 and prolonged help to 2025. Note that in Oracle Cloud, extended assist is with out additional fees.
If you're nonetheless in 11.2.0.4 because you don’t need frequent upgrades, oracle linux certification 19c will be the release to go (however preserve it updated with Launch Updates). If you wish to make sure to do this upgrade as soon as 19c is available on premises, then better to test it as quickly as possible and report any bug you encounter. This means:
enter the beta program. Having a beta program for a release centered more on stability than new options is an awesome resolution from Oracle Development.
test 19c in Oracle Cloud as quickly as available. It's possible you'll use more options than what you could have on-premises for these tests, such because the Performance Analyzer.
he massive new thing, in my view, is that the Java One convention 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 turning into the Oracle Groundbreakers. What I like right here is that there is no point out of technology or development. We're all in the identical project: enhance the user expertise with all the application components, from system to code.
This was also the event to present a talk more focused at builders than at DBA. On the time of Microservices, I wanted to share my experience in Dev and Ops groups, on monolithic, client/server, three-tiers,… architectures. Because segregation of accountability is nice at logical level, however the way in which to efficiency and scalability must often undergo colocation in identical server, process, engine…
In this speak, I mentioned Oracle XE which can be embedded for free. The 18c version of XE was launched Saturday during the ACED Briefing. A lot larger than the 11g but with more options. Compression is an important one because the storage is limited to 12 GB.
19c new Optimizer features
The most effective you are able to do for the optimizer is providing accurate statistics. Every day gathering on stale tables shouldn't be adequate, and dynamic statistics overload parse exercise too much. We could have two new features:
High Frequency Automated Statistics Activity: some statistics gathering will likely be done through the day, when the system is idle, managed by the Resource Manager.
Real-Time Statistics: some statistics (like high/low worth) are maintained during DML. This could be great to keep away from Out-of-Range problems with linear decay from obsolete statistics.
We should not rely on hints, however typically, we need. And we wish to be sure that they're used (because no error is raised when not).
Hint Utilization Reporting: dbms_xplan reports the hints per operation and alias name, with a sign for people who weren't used (and reason)
Talking about DBMS_XPLAN, the comparison of plans have improved:
Examine SQL Execution Plans: shows directly where the plan diverges
At execution time, when a query never ends the worst that can occur is that the impatient run it again. That’s a good suggestion, however all of us do this on Web applications: no answer -> hit F5 a number of times. The question is not going to run faster and this only will increase the contention. Then, higher to cancel the assertion (resource manager can do that) and quarantine the bad execution plan:
Automated Diagnostic and Repair and Quarantine for Runaway Statements
After all, the large feature for the 19c Autonomous Transaction Processing cloud service is Automated Indexing. This deserves a longer description. The quick concept is that a background job will capture and analyze the workload on short-time period (final quarter-hour) to add better indexes, removes them, or blacklist them (SQL Patch) for some queries.
And the characteristic I like probably the most:
Automatic SQL Plan Administration: the capture can be computerized
Enabling the capture for all statements executed times just isn't straightforward, even with the new filters introduced within the latest release. Right here, the capture depends on AWR. When a query is lengthy, the execution plan shall be compared with past AWR snapshots. And if a better plan was used in the past, then this one will be the accepted SQL Plan baseline. This is what we do manually, isn’t it?
If you're nonetheless in 11.2.0.4 because you don’t need frequent upgrades, oracle linux certification 19c will be the release to go (however preserve it updated with Launch Updates). If you wish to make sure to do this upgrade as soon as 19c is available on premises, then better to test it as quickly as possible and report any bug you encounter. This means:
enter the beta program. Having a beta program for a release centered more on stability than new options is an awesome resolution from Oracle Development.
test 19c in Oracle Cloud as quickly as available. It's possible you'll use more options than what you could have on-premises for these tests, such because the Performance Analyzer.
he massive new thing, in my view, is that the Java One convention 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 turning into the Oracle Groundbreakers. What I like right here is that there is no point out of technology or development. We're all in the identical project: enhance the user expertise with all the application components, from system to code.
This was also the event to present a talk more focused at builders than at DBA. On the time of Microservices, I wanted to share my experience in Dev and Ops groups, on monolithic, client/server, three-tiers,… architectures. Because segregation of accountability is nice at logical level, however the way in which to efficiency and scalability must often undergo colocation in identical server, process, engine…
In this speak, I mentioned Oracle XE which can be embedded for free. The 18c version of XE was launched Saturday during the ACED Briefing. A lot larger than the 11g but with more options. Compression is an important one because the storage is limited to 12 GB.
19c new Optimizer features
The most effective you are able to do for the optimizer is providing accurate statistics. Every day gathering on stale tables shouldn't be adequate, and dynamic statistics overload parse exercise too much. We could have two new features:
High Frequency Automated Statistics Activity: some statistics gathering will likely be done through the day, when the system is idle, managed by the Resource Manager.
Real-Time Statistics: some statistics (like high/low worth) are maintained during DML. This could be great to keep away from Out-of-Range problems with linear decay from obsolete statistics.
We should not rely on hints, however typically, we need. And we wish to be sure that they're used (because no error is raised when not).
Hint Utilization Reporting: dbms_xplan reports the hints per operation and alias name, with a sign for people who weren't used (and reason)
Talking about DBMS_XPLAN, the comparison of plans have improved:
Examine SQL Execution Plans: shows directly where the plan diverges
At execution time, when a query never ends the worst that can occur is that the impatient run it again. That’s a good suggestion, however all of us do this on Web applications: no answer -> hit F5 a number of times. The question is not going to run faster and this only will increase the contention. Then, higher to cancel the assertion (resource manager can do that) and quarantine the bad execution plan:
Automated Diagnostic and Repair and Quarantine for Runaway Statements
After all, the large feature for the 19c Autonomous Transaction Processing cloud service is Automated Indexing. This deserves a longer description. The quick concept is that a background job will capture and analyze the workload on short-time period (final quarter-hour) to add better indexes, removes them, or blacklist them (SQL Patch) for some queries.
And the characteristic I like probably the most:
Automatic SQL Plan Administration: the capture can be computerized
Enabling the capture for all statements executed times just isn't straightforward, even with the new filters introduced within the latest release. Right here, the capture depends on AWR. When a query is lengthy, the execution plan shall be compared with past AWR snapshots. And if a better plan was used in the past, then this one will be the accepted SQL Plan baseline. This is what we do manually, isn’t it?
