PLSQL and Flashback Data Archive Problems.

Hi, I have written about flashback data archive before. if you didn’t read please check these post first. http://mustafakalayci.me/2019/03/02/goodbye-log-triggers-welcome-flashback-data-archive/ http://mustafakalayci.me/2020/09/10/flashback-data-archive-problems/ I’ve already mentioned about some problems on my second post but these are not kind of problems which will stop your work. The problem I am about talk is that kind of problem. From my

Direct Path Insert &/vs Conventional Insert

Hi there, I couldn’t write anything for a while. Those days were busy. So I would talk to about direct path insert and conventional insert. Many people think that they are using “direct path insert” when used sqlldr utility but they are not. it is easy to confused batch insert and direct path insert. of

Flashback Data Archive Problems!

Hi, if you don’t know about flashback data archive you can check this post first: http://mustafakalayci.me/2019/03/02/goodbye-log-triggers-welcome-flashback-data-archive/ I mentioned about flashback data archive (FDA) in that post and really flattered it. Well, maybe I shouldn’t! FDA is really fast dml tracking method but thanks to Peter Schlaeger, I noticed some potential problems and “some” solutions. Few

Oracle Table Compression Part1

Hi, I have been dealing with table compression a lot during my development period and I still do. I wanted to share some information about table information but I believe this will be a long explanation so I will write them in parts and this is part1. Table compression is a very useful feature of

Redo Log Switch Order

Hi, I always have the impression that redo log switch occurs in group number order but a small test showed me, I was wrong. As you know redo log is one of the most important part of a Oracle database. it almost protect everything! your data in memory, data file, your transaction etc.  whenever you

NVME Drives and Oracle Database

Hi There, NVME drives are so hot these days. They have amazing read/write speed. my old samsung ssd drive can read and write around 550/530 MB per second and my even older 2.5inch hdd drive has 45/20 MB per second. Current NVME disc drives has around 3500 read and 3000 MB per second which is

Control File Content and the Limits

Hi, I would like to talk about Control File (CF). One of the most important component of the Oracle Database. It stores many critical data and limits for the database. Last SCN (System Change Number). Last Checkpoint Information. Data file locations. Redo log file locations. RMAN Repository (where the backup related files are). Parameters like