This is the last post in this series and I’ll not introduce anything new here, but rather just summarise the changes explained and talk a bit about the value the solution delivers to the organisation.
Let’s first review the situation we faced before implementing the changes.
The cost of writing (more...)
Reducing storage requirements
In the last post in this series I talked about how we sped up the move of data from operational to historical tables from around 16 hours down to just seconds. You find that post here.
The last area of concern was the amount of storage this (more...)
The New Zealand Oracle Users Group - NZOUG Conference 2013
is open for registrations
and Earlybird pricing is still available! The agenda
is now available.
NZOUG 2013 is being held in Wellington at the iconic Te Papa Museum
on the beautiful waterfront on the 18th and 19th of March, with an additional Workshop Day
on the 20th March.
The conference will see a wealth of brilliant speakers
from around the world, including Tom Kyte, Graham Wood, Andrew Holdsworth, John Schiff and Nadia Bendjedou and of course top speakers from Middle Earth
(NZ) as well. Tom, Andrew and Graham will be (more...)
Today at Amazon AWS re:invent, Amazon announced a cloud service for data warehouse customers. It allows to easily analyse petabytes of data, interacts with known BI solutions, and it’s usually 10 times faster than traditional implementations… queries run really blazing fast! This service is certified by MicroStrategy and Jaspersoft.
Redshift runs (more...)
For several years I’ve been using Oracle and other SQL relational databases. I’ve dedicated most of the time of my researching and developing on Oracle technology. There’s no question that Oracle leads on site installations and that the quality of the products and the ROI is one of the best. (more...)
Just a quick mention when you get the error bellow while trying to create a trigger for example:
CREATE OR REPLACE TRIGGER AGE_GROUP_TRG
BEFORE INSERT ON AGE_GROUP REFERENCING
NEW AS NEW
FOR EACH ROW
SELECT AGE_GROUP_SEQ.nextval INTO :NEW.AGE_GROUP_ID FROM dual;
ORA-00603: ORACLE server session terminated by fatal error
ORA-00600: internal error code, arguments: [kqlidchg1], , , , , , , , , , , 
ORA-00604: error occurred at recursive SQL level 1
ORA-00001: unique constraint (SYS.I_PLSCOPE_SIG_IDENTIFIER$) violated
00603. 00000 - “ORACLE server session terminated by fatal error”
*Cause: An ORACLE server session (more...)
We can’t stop the social flow! Social networks are ruling the world. So as I had some free time lately, I decided do create a facebook fan page. For most of us with a facebook profile visited daily, it’s easier to follow syndications and we’ve got a better (more...)
In the last 10 weeks suddenly I lost 80% of my blog visits… thanks to google! In the last 6 months I found dozens of copycats of posts I wrote and those sites have a greater rank than my legit original blog!
For that, Thank you a lot google… you’re (more...)
Red Hat Enterprise Linux has been out since November of 2010. Here we are 16 months later and it's not certified for database use by Oracle yet.
Yes, I know the database can be installed on RHEL6. In fact, I have it running in my development environment right now with no issues related to the OS/DB integration. Try to get Oracle Support to help you on those platforms for an issue unrelated to
These days I configured Oracle OSWatcher tool and yast package for EM Grid Control used to manage and monitor Oracle servers. I want to share how quickly to configure and start using them on Linux.
OSWatcher invokes system utilities like ps, top, iostat, vmstat, netstat and collects data according to the specified parameters. You can download it from Metalink.
unzip it to OSWatcher directory you would use($OSWATCHER_HOME)
tar -xvf oswbb4.0.tar
OSWatcher has been renamed to OSWatcher Black Box to avoid the confusion with the too many tools with this name. OSWatcher Black Box (more...)
I've been reviewing a lot of resume's lately. Please tell me, what is the purpose stating your "Job Objective"? Isn't it implied that your objective is to find a new job, specifically my job? I assume you're dynamic and technical and your vast expertise will help my company conquer the world.
Also, what is the purpose of summarizing your experience on the first page and then giving me eight
Interesting take on what managers are thinking: http://quickbase.intuit.com/blog/2012/01/09/10-things-your-boss-isnt-telling-you/
I am using resumable space for a lot of my operations. However, it seems as though the SQL*Plus copy command doesn't respect the resumable feature?
Note, I am issuing an "alter session enable resumable timeout 14400" through a login trigger. I know this works because if I do the same type of operation through an INSERT/SELECT through a dblink, my session waits for more space to be added.
We just upgraded one of our 10.2.0.3 dbs to 22.214.171.124 plus some patches. Today an interesting ORA-07445 was thrown to the alert.log:
ORA-07445: exception encountered: core dump [__intel_new_memcpy()+382] [SIGILL] [ADDR:0x3FE5CAE] [PC:0x3FE5CAE] [Illegal operand] 
Searching metalink didn't get us anywhere, so we opened a TAR (or iTar, or SR, or ServReq, or whatever the heck they are calling
I am running this query:
DELETE FROM tab;
It's been running since 2PM yesterday. Can you make it go faster?
You shouldn't delete 80M rows in a single transaction. You should have used TRUNCATE instead of DELETE. I have killed your session and it will be a while before it completes.
Developer (5 minutes later):
I tried TRUNCATE but it says my table is locked.
I know, the
I often get asked to take a look at an Oracle eBusiness Suite concurrent request to see what it is doing, this can come from a few different angles:
- What requests are currently running?
- I have an operating system process that is taking too much CPU - what is it doing?
- Can you tell me where the request is at? I've clicked on the log but it doesn't show anything!
- My request is taking too long - can you check for blocking locks?
There are a number of strategies to track and trace where things are at for a running (more...)
I have a persnickety problem with a particular table being aged out of the buffer cache. I have one query that runs on a defined basis. Sometimes when it is run, it does a lot of physical reads for this table. Other times, it does no physical reads.
So I decided to play around with a different buffer pool and let this table age out of cache on it's own terms rather than competing in the
While researching a corrupt block on 11g SE, we came across a number of objects that were compressed according to the data dictionary.
How could that be? Compression is not a feature of SE, or so we thought.
The objects in question were all indexes. In fact, Oracle creates compressed indexes in ?/apex/core/tab.sql even though we are on SE.
Further investigation lead me to Doc 1084132.1 which
Sometimes tuning a database can be rewarding. I get great satisfaction when helping a user take their query from 10 minutes down to 3 seconds. But it doesn't always work that way. Consider this recent exchange:
Developer to DBA Manager: The database is slow.
DBA Manager to DBA: Trace his process.
The DBA traces the developer's process and comes up with about 12 queries that can benefit from
I drill into my DBAs heads that the first step in tuning any process is to get a trace. Don't show me the query plan until you show me what the database actually executed. The trace is the fundamental clue in any performance investigation. The wait events tell you exactly what's going on and there is no question where the bulk of the time is being spent.
When we see a large number of waits on