Category Archives: Reference

Short references for personal… reference. Basically a howto for the tech-savvy.

Finding the most expensive recent SQL queries on SQL Server

Mostly a note to self, original source here. SELECT TOP 10 SUBSTRING(qt.TEXT, (qs.statement_start_offset/2)+1, ((CASE qs.statement_end_offset WHEN -1 THEN DATALENGTH(qt.TEXT) ELSE qs.statement_end_offset END – qs.statement_start_offset)/2)+1), qs.execution_count, qs.total_logical_reads, qs.last_logical_reads, qs.total_logical_writes, qs.last_logical_writes, qs.total_worker_time, qs.last_worker_time, qs.total_elapsed_time/1000000 total_elapsed_time_in_S, qs.last_elapsed_time/1000000 last_elapsed_time_in_S, qs.last_execution_time, qp.query_plan FROM sys.dm_exec_query_stats qs CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) qt CROSS APPLY sys.dm_exec_query_plan(qs.plan_handle) qp ORDER BY qs.total_logical_reads DESC — logical reads […]

Creating a local Certificate Authority using OpenSSL

I was recently tasked with creating a local CA for a project, where we needed to verify custom client certificates, have the ability to revoke them at will, and we wanted to add additional custom fields to the certificates. Cool. The first stop after searching a bit was this excellent howto by Jamie Nguyen. There’s […]

Figuring out which session is blocking a query on Microsoft SQL Server (query suspended)

I was recently debugging a case where a customer’s installation was hanging due to a database lock. The issue turned out to be that the database was not set to a default transaction level of READ COMMITTED SNAPSHOT, which the product expects. Regardless, while troubleshooting the issue, I stumbled upon a very useful SQL query […]

Installing Windows XP on the Dell Vostro 1700

This is basically the same procedure as installing Windows XP on the Fujitsu Siemens Esprimo u9200, in that it needs custom SATA drivers to find the harddisk during install, as well as a bunch of other ones. For this install, I decided to actually create a driver disk, and use a real floppy drive. I […]

Windows Volume License Keys (VLK)

I keep having to look these up, especially the “Upgrade Key” at the bottom. So I stored them here. Windows Server 2016 Operating system edition KMS Client Setup Key Windows Server 2016 Datacenter CB7KF-BWN84-R7R2Y-793K2-8XDDG Windows Server 2016 Standard WC2BQ-8NRM3-FDDYY-2BFGV-KHKQY Windows Server 2016 Essentials JCKRF-N37P4-C2D82-9YXRT-4M63B Windows 10 Operating system edition KMS Client Setup Key Windows 10 […]