can anyone please let me know that what limitations does oracle apex have,
limitations like Storage, RAM or other.
How long will i be able to use it without licensing the database?
Oracle APEX is a no-cost feature of the Oracle Database. If you use a free Oracle database (Oracle XE) then Oracle APEX is free to use. You can also gain free access to Oracle APEX at http://apex.oracle.com. If wish to use Oracle APEX on the cloud you can do so with Oracle Exadata Express (http://cloud.oracle.com/database) and many other database cloud services. Free cloud 1 month trials may also be available.
i found this in oracle website, and i now understand that storage differ in each version.
With respect to growing needs for storage, Oracle Database 11g XE now offers a full 11GB for user data alone, which is almost threefold increase since previous 4GB limit in Oracle Database 10g XE. Other hardware restrictions remain the same with CPU usage capped at one physical core and memory at 1GB. Oracle Database 11g XE is available immediately for Windows and Linux platforms.
Source:
http://www.oracle.com/technetwork/articles/sql/11g-xe-quicktour-498681.html
Related
we recently upgraded our db from 11g to 12c, now db with 12.2 version on linux.
the db is mostly of oltp type, having around 150GB application data and tables having approx 5GB to 10Gb in size,
after upgradation the performance of db is degraded, we believe we can improve that by changing db parameters.
Can you pls suggest any oracle parameters to look for to improve performance apart from memory related.
and any parameters specific to 12.2 version ?
Please check wehat is the value of parameter OPTIMIZER_FEATURES_ENABLE i.e. whether you are using 11g optimizer of 12c optimizer. Sometimes 12c optimizer dont perform well along with that check the values of OPTIMIZER_ADAPTIVE_PLANS and OPTIMIZER_ADAPTIVE_STATISTICS. Please refer to this article. I have faced a similar performance issue after migration from 11g to 12.2c, so please share yur feedback after checking these parameter values.
Currently we have a database running on Oracle 10g (10.2.0.2) in production which needs to be up 24/7, but since it is not supported by the data center, both server OS and Oracle database 10g, we have to move to Oracle 12c as agreed by the superiors. I know I can't use a direct expdp/impdp from 10.2.0.2 to 12.2.0.1. And with limited resources, meaning server resources and no access to oracle support to download oracle 10.2.0.5 patch set or any patch set that is available.
What is the safest and best way with minimal downtime option to move it from 10g to 12c? Do I need to install an 11gR2 software and use it to expdp the data?
The impdp should be downward compatible, but what you can do is:
Do the expdp of your 10.2 database with the 12c software
Use the VERSION parameter of expdp and impdp if you still have problems
You have not told us how big your 10.2 database is and whether you have a limited budget or not. Sometimes the 'superiors' want every last transaction accounted for, and the only way to do this is to use Goldengate. So you can setup the target database, take as long as you need to import the data, and all the while goldengate is keeping the source and target in synch. Goldengate is expensive though and should only be necessary if you have terabytes to deal with.
I have a Oracle 10g database currently in a server.
I will create a web which may have massive requests to get data from the Oracle 10g. So, to prevent degrade the Oracle 10g database and server performance, I would like to setup an Oracle Express 11g to another server, periodically (say 15 minutes) get the data from Oracle 10g to Oracle Express 11g.
Finally the web will just get the data from the new server. And the only loading to the Oracle 10g is the data synchronization. There are just 2 tables in Oracle 10g need to sync.
My question is how can I set up the data synchronization?
For example, can I set up linked server, and set materialized view with refresh period between 2 oracles.
I am new to Oracle, welcome any useful reference materials and idea.
I've spent 2 days to sync postgresql database to oracle. Read few books, googled many times..
1. I have setup PostgreSQL on CentOS 6.5 (A) also installed oracle database on this VPS. copied GoldenGate to it.
2. I have already setup 2 oracle VPS using Goldengate and setup as Source (B) and Target (C). I'm trying to sync PostgreSQL to Target VPS.
3. GoldenGate runs on A server without error.
The problem is when I setting up it requires ODBC config (page 14). I'm new to PostgreSQL so little confusing for this..
Also when I google i find only to postgresql from oracle.
Main doc I'm following is http://docs.oracle.com/cd/E35209_01/doc.1121/e29642.pdf
Actually I have found Oracle Golden Gate new features https://blogs.oracle.com/dataintegration/resource/2013-DIFamily/OGG_WinUnix_Rel_Notes_11.2.1.0.7.pdf
Oracle Golden Gate don't support what I want to do.
They say:
Oracle GoldenGate introduces support for PostgreSQL. This support includes the mapping, manipulation,
filtering, and delivery of data from other types of databases to a PostgreSQL database. Oracle GoldenGate
does not support the capture of data from PostgreSQL to other PostgreSQL databases or to other kinds of
databases.
GoldenGate does not support Postgres as a source - only target.
Check out Attunity for what you are trying to do.
Postgres support was only for delivery in Oracle GoldenGate 12.2. Oracle is working on a full capture/delivery support for Postgres. It will be out in a later release post 19c. Please check the OTN website for versions.
the designing.making/deploying/management of a distributed database?
or do i need to buy the versions for the above?
if it 10g express has this support, will there be a central point to which my web application will connect, or do i have to write connection strings to connect to each server making "the distributed database "
please also refer to this post
Oracle distributed databases and MSVC
Oracle Express Edition is limited to a single CPU and 4GB of data on a single server. That's why it's free. If you want to use it in a distributed configuration you will have to write the glue yourself.