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May 2018

Users, schemas & privileges in #Exasol

Submitted by Uwe Hesse on Wed, 2018-05-23 14:18

Exasol Logohttps://uhesse.files.wordpress.com/2018/05/exasol_logo.png?w=150 150w" sizes="(max-width: 161px) 100vw, 161px

Sneak Preview of pgio (The SLOB Method for PostgreSQL) Part III: Link To The Full README file for Beta pgio v0.9.

Submitted by kevinclosson on Wed, 2018-05-23 06:22

If you are interested in a head start on pgio, the following is a link to the full README file which has some loading and testing how-to:

The pgio text README file version 0.9 Beta

Sneak Preview of pgio (The SLOB Method for PostgreSQL) Part II: Bulk Data Loading.

Submitted by kevinclosson on Wed, 2018-05-23 06:12

Bulk Data Loading With pgio Version 0.9 Beta

Now that pgio (the SLOB Method for PostgreSQL) is in Beta users’ hands I’m going to make a few quick blog entries with examples of pgio usage. The following are screen grabs taken while loading 1 terabyte into the pgio schemas. As the example shows, pgio (on a system with ample storage performance) can ready a 1 terabyte data set for testing in only 1014 seconds (roughly 3.5TB/h loading rate).

$ cat pgio.conf
UPDATE_PCT=0
RUN_TIME=120
NUM_SCHEMAS=4
NUM_THREADS=2
WORK_UNIT=255
UPDATE_WORK_UNIT=8
SCALE=1G

DBNAME=pg10
CONNECT_STRING=”pg10″

CREATE_BASE_TABLE=TRUE

Sneak Preview of pgio (The SLOB Method for PostgreSQL) Part I: The Beta pgio README File.

Submitted by kevinclosson on Tue, 2018-05-22 23:52

The pgio kit is the only authorized port of the SLOB Method for PostgreSQL. I’ve been handing out Beta kits to some folks already but I thought I’d get some blog posts underway in anticipation of users’ interest.

The following is part of the README.txt for pgio v0.9 (Beta). SLOB users will find it all easy to understand. This is the section of the README that discusses pgio.conf parameters:

UPDATE_PCT

The percentage of SQL that will be UPDATE DML

RUN_TIME

runit.sh run duration in seconds

NUM_SCHEMAS

pgio data is loaded into either a big single schema or multiple. NUM_SCHEMAS directs setup.sh to create and load NUM_SCHEMAS schemas.

NUM_THREADS

For setup.sh:  This parameter controls the number of concurrent
data loading streams.

For runit.sh:  This parameter controls how many sessions will attach to
each NUM_SCHEMAS schema.

Running Code as SYS From Another User not SYSDBA

Submitted by pete on Tue, 2018-05-22 18:42

I have been embroiled in a twitter thread today about the post i made in this blog yesterday around granting privileges to a user and who should do the granting. Patrick today asked a further question: How do you make....[Read More]

Posted by Pete On 22/05/18 At 08:42 PM

Who Should Grant Object Rights?

Submitted by pete on Mon, 2018-05-21 17:09

Patrick Jolliffe posted a question via a tweet back in April but due to personal health pressures with a close relative of mine I have not had the time to deal with much over the last few months. I did....[Read More]

Posted by Pete On 21/05/18 At 07:08 PM

5 years

Submitted by Timur Akhmadeev on Mon, 2018-05-21 15:00

I’ve joined Pythian exactly 5 years ago. Back then I was a performance guy, with no real DBA and operational support experience. I knew enough about technologies though. Still getting up to speed with common admin tasks took me almost a year. At some point later it became a bit boring: dealing with out of space issues and other noise during on-call can’t be appealing for long. After ~2 years I had an opportunity to join a big project which required experience in things I was familiar with. It lasted for almost a year, and it was a useful experience.

Announcing July/August Australian Dates: “Oracle Indexing Internals and Best Practices” Seminar

Submitted by Richard Foote on Mon, 2018-05-21 07:58

I’m very excited to announce new Australian dates for my highly acclaimed “Oracle Indexing Internals and Best Practices” seminar. This is a must attend seminar of benefit to not only DBAs, but also to Developers, Solution Architects and anyone else interested in designing, developing or maintaining high performance Oracle-based applications. It’s a fun, but intense, […]

Attribute clustering….super cool

Submitted by connor_mc_d on Mon, 2018-05-21 05:12

I’ve spoken about attribute clustering before here, here and here. So from that you can probably glean that I’m a fan.

I recently spoke about an example of this as well during my AskTOM Office Hours session which you can watch below:

You need scaling huh? Maybe it’s just ego

Submitted by connor_mc_d on Mon, 2018-05-21 03:38

I’ve just come back from OracleCode Singapore.  It was a great event – the venue was awesome and the attendees were engaged and interested in the content. But there was one thing that I found amusing (disturbing perhaps?) is the number of times I had people approach me on the topic of scaling.  Conversation would typically run along the lines of:

“What is your recommendation for scaling?”

which almost suggests that scaling is of itself, the end solution here.  Not “Here is function X, and I need it to scale”, or “My business requirement is X, and it needs to scale” but just “I need to scale”