Search found 25 matches

by zvika
Wed Mar 20, 2013 11:53 pm
Forum: Vertica Performance Tuning
Topic: Are Bind Variables Relevant in Vertica?
Replies: 2
Views: 8286

Re: Are Bind Variables Relevant in Vertica?

Hi , I don't think so. Vertica is for BI and DWH and not for OLTP Bind variable are not suited for Vertica. Oracle use binds in order to keep the shared pool from exploding. Even in Oracle when you are using it for BI and DWH it's better NOT to use binds ( as long as the number of queries will be re...
by zvika
Sat Feb 02, 2013 10:43 am
Forum: Talend
Topic: Vertica SCD Component Performance Issues
Replies: 2
Views: 19287

Re: Vertica SCD Component Performance Issues

If you are using updates a lot then I can tell you that we are suffering from performance issue on our updates ( part of it is our fault as we took Oracle code and use it in Vertica) and we are getting 4 updates/sec on a simple dimension . From my experiences Updates are not performing well in Verti...
by zvika
Thu Jan 31, 2013 3:56 pm
Forum: Vertica Performance Tuning
Topic: Loads into pre-join projections of 2 fact tables don't scale
Replies: 6
Views: 15447

Re: Loads into pre-join projections of 2 fact tables don't s

Julie wrote:FYI ..


Basically, insert statements suck in Vertica :mrgreen:

If you still want to use inserts, we found that separating the inserts on different nodes so that they run in parallel helped with performance.

This is interesting as Updates also sucks .... :-)
by zvika
Wed Jan 23, 2013 9:30 am
Forum: Vertica Performance Tuning
Topic: How to optimize
Replies: 6
Views: 29333

Re: How to optimize

Hi , ** your query isn't valid ( where needs to be before the group by ) First try to partition base on the pay_date column or function on this column so it will create daily or monthly partitions and as a result Vertica will use partition pruning and won't scan the entire table . Second create a pr...
by zvika
Fri Jan 18, 2013 3:43 pm
Forum: New to Vertica Database Administration
Topic: WOS Overflow
Replies: 4
Views: 9562

Re: WOS Overflow

As jpcavanaugh wrote you can control the amount of ram wos is using by changing the wosdata resource pool.
You can also change the time of the moveout process so it will move the data from wos to ros more frequently.
by zvika
Wed Jan 09, 2013 7:54 am
Forum: Vertica Upgrade
Topic: Vertica Upgrade v5.0.8 to v6.1
Replies: 3
Views: 20620

Re: Vertica Upgrade v5.0.8 to v6.1

Hello, I'd recommend following the upgrade paths as indicated in the docs! In your case, most likely: Vertica 5.0 to 6.0 Vertica 6.0 to 6.1 Each step can be completed in less than 15 minutes each... You may be used to the old back up methods. From the docs: With Release 5.1, Vertica introduced new ...

Go to advanced search