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Multiple Index Regression Analysis
I actually had a blog entry started on this topic before IDUG. I knew this was possible, but not exactly how to do it. Then I sat in Scott Hayes’ session – D04 – More Sage Advice: Invaluable DB2 LUW...
View ArticleDB2 Basics: Filesystems for DB2 on Unix and Linux Systems
DB2 doesn’t have any defaults for filesystems because that is an OS-level thing. However, there are a few sanity checks and some recommeded separation when installing DB2 on Linux and UNIX operating...
View ArticleArchitecting High-Availability and Disaster Recovery Solutions with DB2
NOTE: Please do not attempt to architect a high-availability solution without a DB2 expert involved. There are many questions and answers needed beyond those here to make the best decision and ask all...
View ArticleAnalyzing Package Cache Size
Note: updated 7/21 to reflect location of the package cache high water mark in the MON_GET* table functions I have long been a fan of a smaller package cache size, particularly for transaction...
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Calculating PVUs for IBM DB2 on Linux
DBAs do not have to calculate PVUs(Processor Value Units) often. Many times there is a system administrator or someone else who might do this for us. Or if you’re buying everything from IBM, then...
View ArticleError When Running PowerShell Script with IBM.Data.DB2 Driver
Having just solved this problem for the second time in two weeks, I thought I’d blog about it to make it easier to find the next time. Problem This genereally occurs when you are executing a PowerShell...
View ArticleMultiple Instances in DB2 for Linux/UNIX and in DB2 for Windows
I have been working with multiple instances on Windows servers lately, and have learned a few things about them, so I thought an article about multiple instances in general would be a good thing. The...
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db2haicu TSAMP Advanced Topics: Objects Created
I have written quite a few articles on TSA, but thus far, they’ve been strongly focused on the basic how-to. I think this is because so many of us start with the how of a technical topic. As my...
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Installing a Local Copy of the IBM DB2 10.5 Documentation
I have written about this before for version 9.7. The IBM DB2 Knowledge Center can be a bit unreliable – sometimes the search doesn’t return the obvious results. Sometimes it’s down entirely at the...
View ArticleUsing DB2’s New Native Encryption Feature
With fixpack 5 of DB2 10.5, IBM introduced Native Encryption for data at rest in DB2. This is a fairly significant new feature for introduction in a fixpack. It does require separate licensing – either...
View ArticleIssues with STMM
I thought I’d share some issues with STMM that I’ve seen on Linux lately. I’ve mostly been a fan of STMM, and I still am for small environments that are largely transaction processing and have only one...
View ArticleDB2 Administrative SQL Cookbook: Listing the Number of Pages in Tablespaces,...
Purpose This is a bit of a rare use case. The main use I see for it is if a database server has an excess of memory and you want to size your bufferpools so that the entire database fits in-memory....
View ArticleSpeeding up DB2 Backups
It’s a question I hear frequently – How can I speed up backups? I thought I’d share some details on doing so. Database Layout Any backup cannot be faster than it takes to back up the largest...
View ArticleDB2 Backups When Using Native Encryption
I’ve recently implemented native encryption for a small database on a server that is somewhat oversized on CPU and memory. One of the things I noticed after encrypting my database was both increased...
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Ongoing Support of DB2’s HADR
There are some things to be aware of with ongoing support of a HADR system. I thought I’d group them together to provide a primer of do’s and don’ts for support of HADR. Monitoring HADR HADR does...
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Looking Forward to IBM Insight 2015
IBM Insight starts in less than two weeks! You can still register and attend if you haven’t planned to already! General Tips Website If you haven’t registered already, check out the IBM Insight website...
View ArticleDB2 Administrative SQL Cookbook: BLU Compression Ratios
Purpose This statement calculates the compression ratio for BLU tables. The compression ration can be used to help identify tables where compression is not optimal and you may need to look into why....
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Improving Performance of DBCLEAN Deletes
While this post is specific to WebSphere Commerce, it covers concepts that may apply to tuning other delete statements as well. Using Functions in the Best Place The CLEANCONF table stores the delete...
View ArticleDB2 Administrative SQL Cookbook: Column Selectivity by Table (BLU)
Purpose This statement reports how selective at the column level queries are that run against a specific table. This does not look at overall selectivity or row selectivity. It will only work in DB2...
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Insight 2015 Brain Dump
I call my post-conference blog posts brain dumps because that is largely what they are – information formatted in a way my brain understands but not necessarily as thoroughly organized and researched...
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