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The Ivica Arsov Blog - Database Management & Performance | iarsov.com Reviews
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Troubleshooting TNS-12531 (TNS:cannot allocate memory error) - The Ivica Arsov Blog
https://iarsov.com/2015/01/tns-12531-troubleshooting-tnscannot-allocate-memory-error
The Ivica Arsov Blog. Database Management and Performance. Increase VARCHAR2, NVARCHAR2, and RAW data types size with 12c. Partial GLOBAL and LOCAL indexes →. Troubleshooting TNS-12531 (TNS:cannot allocate memory error). Posted by Ivica Arsov. The tnslsnr process was stuck and those few times that I tried to start the listener I was waiting forever on. Starting /u01/app/grid/product/12.1.0/grid/bin/tnslsnr: please wait…. This is some of the output from listener.trc. Cat /usr/include/netdb.h grep 'EAI...
I'm speaking at BGOUG Conference 2015, June, Plovdiv - The Ivica Arsov Blog
https://iarsov.com/2015/06/im-speaking-at-bgoug-conference-2015-june-plovdiv
The Ivica Arsov Blog. Database Management and Performance. LATERAL inline views / GROUP BY and scalar subquery caching →. I’m speaking at BGOUG Conference 2015, June, Plovdiv. Posted by Ivica Arsov. In about a week I’ll be speaking at BGOUG for Oracle Data Redaction 12c. It is an event with great speakers/topics and very very well organized. This year there’ll be speakers like Thomas Kyte, Kerry Osborne, Joel Goodman and much more, you can check the full speakers/topics list here. On Oracle DB Time.
Function Based Indexes and Data Redaction | Ivica Arsov's blog
https://iarsov.com/2015/02/function-based-indexes-and-data-redaction
Ivica Arsov's blog. Database Management and Performance. Partial GLOBAL and LOCAL indexes. Data Redaction thoughts →. Function Based Indexes and Data Redaction. Posted by Ivica Arsov. With Data Redaction we can define policy for specific table/view columns where its data is redacted when it’s queried by end/application users. I won’t go into details about how policies are created, the available types for redaction etc… For that topic you can check Data Redaction part 1. Or indexes based on expression.
Ivica Arsov's blog | Database Management & Performance | Page 2
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Ivica Arsov's blog. Database Management and Performance. Newer posts →. Posted by Ivica Arsov. I found this sitting in drafts, short post regarding period overlapping. With simple logic we can eliminate the OR conditions related to all possible combinations. The possible four cases where period overlap can occur are:. One way we can determine the overlapping periods is if we use OR conditions for all cases, e.g.:. If you are familiar with De Morgan’s laws. From school 🙂 ) then:. Newer posts →. The views...
Archives | Ivica Arsov's blog
https://iarsov.com/archives
Ivica Arsov's blog. Database Management and Performance. Performing Partial Restore and Recovery. Sequences - short cache/nocache demo. View merging and dbms random anomaly. Active Services on Physical Standby Database. How to enable recovery for disabled pluggable database in Data Guard enviorement. LATERAL inline views / GROUP BY and scalar subquery caching. I'm speaking at BGOUG Conference 2015, June, Plovdiv. Function Based Indexes and Data Redaction. Partial GLOBAL and LOCAL indexes. Recovery from l...
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oracle 12c multitenant architecture | nimaidba
https://nimaidba.wordpress.com/2016/04/06/oracle-12c-multitenant-architecture
Welcome to the world of Oracle with me…. Laquo; export/import syntax which may help. Oracle 12c multitenant architecture. April 6, 2016 by nimaidba. Last day I just installed and was thinking to let start with some basics on oracle 12c like what is it? Why we need it? What are the new features available? So after some research on that (although it was not so hard. :) I came to know with some below points. Manage Many Databases As One. Fewer Patches and Upgrades. I only have noted which seems important fo...
2014 in review | nimaidba
https://nimaidba.wordpress.com/2014/12/30/2014-in-review
Welcome to the world of Oracle with me…. Laquo; Oracle 12c Enterprise Manager Installation. Lost Writes with Oracle and Data Guard. December 30, 2014 by nimaidba. The WordPress.com stats helper monkeys prepared a 2014 annual report for this blog. Here’s an excerpt:. The concert hall at the Sydney Opera House holds 2,700 people. This blog was viewed about 10,000. Times in 2014. If it were a concert at Sydney Opera House, it would take about 4 sold-out performances for that many people to see it. Follow Bl...
High Availability | nimaidba
https://nimaidba.wordpress.com/2015/12/22/high-availability
Welcome to the world of Oracle with me…. Laquo; Lost Writes with Oracle and Data Guard. Export/import syntax which may help. December 22, 2015 by nimaidba. Today Hemant Sir have posted a good link that represent some basic for oracle HIGH AVAILABILITY with demonstration. Please click the link…. Oracle High availability demos…. Hope this helps…. Posted in Backup and Recovery. Leave a Reply Cancel reply. Enter your comment here. Fill in your details below or click an icon to log in:. Hits in the world.
Where is my PL/SQL? – restore and recovery of PL/SQL code – progeeking
https://progeeking.com/2015/06/01/where-is-my-plsql-restore-and-recovery-of-plsql-code
Written by Nikolay Kovachev. June 1, 2015. June 5, 2015. Where is my PL/SQL? 8211; restore and recovery of PL/SQL code. Sometime it can happen to lose PL/SQL code from the database. What’s the reason behind is not important. The only important thing is to recover it as soon as possible. Fortunately Oracle is storing the PL/SQL code in tables, that makes the recovery quite easy. For this I’m using two techniques, which I’m gonna cover in here. SQL select TEXT from all source AS OF TIMESTAMP TO TIMESTAMP('...
12c HCC Row-Level Locking – progeeking
https://progeeking.com/2014/09/11/12c-hcc-row-level-locking
Written by Nikolay Kovachev. September 11, 2014. September 11, 2014. 12c HCC Row-Level Locking. In Oracle Database 12. We can find many new and shiny things… So many that we can miss the little good things really easy. I think this one, is one of them. Previously I made a post “ All About HCC. 8220;, describing how HCC is working and some of the issues that we can hit while using it. Well 12c is resolving another one of them. Now we have Hybrid Columnar Compression – Row-level Locking. And the result is:.
I’m speaking at OUG Ireland – progeeking
https://progeeking.com/2015/03/09/im-speaking-at-oug-ireland
Written by Nikolay Kovachev. March 9, 2015. I’m speaking at OUG Ireland. Next March 19th I’ll be speaking at OUG Ireland in Dublin, presenting some cool stuff around Oracle Database 12c, PDB Cloning, ZFS snapshots and Change management through EM12c. The topic is easy going and can be interesting for DBA’s and developers as well. The abstract and agenda of OUG Ireland is in here http:/ bit.ly/1vg3Lie. Click to share on LinkedIn (Opens in new window). Share on Facebook (Opens in new window). Next Post Opt...
B-tree and nulls – progeeking
https://progeeking.com/2014/06/25/b-tree-and-nulls
Written by Nikolay Kovachev. June 25, 2014. July 19, 2015. Today while I was scrolling my “WordPress reader” page I saw a post. Which reminds me to something I had fun before /and find it useful in many situations/:. So if we have an index based on null column followed by not null column we can use it to filter the rows with null value. Instead of not null column we use constant as well: create index nulls on t(a,1);. Click to share on LinkedIn (Opens in new window). Click to email (Opens in new window).
I’m speaking at SrOUG and beIT – progeeking
https://progeeking.com/2015/04/27/im-speaking-at-sroug-and-beit
Written by Nikolay Kovachev. April 27, 2015. I’m speaking at SrOUG and beIT. Next month I’m honored to speak at two great conferences – SrOUG and beIT. Click to share on LinkedIn (Opens in new window). Share on Facebook (Opens in new window). Click to share on Twitter (Opens in new window). Click to share on Google (Opens in new window). Click to email (Opens in new window). Click to print (Opens in new window). Click to share on Pinterest (Opens in new window). Leave a Reply Cancel reply.
About – progeeking
https://progeeking.com/about
That’s my totally unserious blog for serious geeks 😉. Everything in here is mine! 😀 Not to my employer…. If you feel like having a need to ping me:. Http:/ en.gravatar.com/kovachevpro. Or simply use the form 😉. Click to share on LinkedIn (Opens in new window). Share on Facebook (Opens in new window). Click to share on Twitter (Opens in new window). Click to share on Google (Opens in new window). Click to email (Opens in new window). Click to print (Opens in new window). Leave a Reply Cancel reply.
Optimizer statistics – Gathering Statistics and Histograms – progeeking
https://progeeking.com/2015/03/12/optimizer-statistics-gathering-statistics-and-histograms
Written by Nikolay Kovachev. March 12, 2015. September 17, 2015. Optimizer statistics Gathering Statistics and Histograms. First we shall review how Oracle is gathering statistics and histograms on partition level. Basically most of the things described for partitions are true for non partitioned tables as well. Focus mainly on the highlighted lines, which I describe later:. Let’s see it in action:. Now let’s look at global level. According to the documentation, in order to incrementally maintain global ...
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The Ivica Arsov Blog - Database Management & Performance
The Ivica Arsov Blog. Database Management and Performance. Posted by Ivica Arsov. As last year, this year is also expected to be busy. Below is the list of conferences were you can (potentially) meet me, drink beer and have fun. I plan to attend to all of the conferences listed. The green (bold) color indicates my abstracts have been selected. If you’re interested more about the talks and conference details check Professional Activities. May – UKOUG Northern Technology Summit, Leeds – UK. OCM 12c and 11g.
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