Henson, Halle Bailey, Fantasia and H.E.R. Man, 49, is arrested after boy, seven, dies in horror hit-and-run as he played football with his friends in his Ronaldo kit - after his parents pleaded with the driver to hand themselves in Gisele Bundchen and rumored boyfriend Joaquim Valente are seen arriving TOGETHER at his Valente Brothers gym in Miami "Goldie Hawn: Amy Schumer's mother-daughter comedy 'going to be a blast' ". Go get SQLQueryStress now, and get the usp_RandomQ scripts for the top queries from that hit the Stack Overflow database.King Charles gets Santa's seal of approval as he meets Father Christmas at festive market: One's at the 'very top of the good list' Sands, Nicole (March 26, 2016). It’s a great way to show a server that looks like home, and gets students to figure out which queries are causing problems – and which ones are just harmless background noise. I love using this quick-load-generation technique in our performance tuning classes. The end result is beautiful – well, at least if you want something that looks like a production server getting hammered with all kinds of different queries: AAAAAHHHH, THE SERVER’S ON FIRE Instead, by using %2 before calling GetVotesDetails (which gets blocked in my scenario), I make sure that no more than half of my sessions will get blocked at once. After a few seconds, the only symptom my server will have is blocking – and that’s no fun. Due to the wonders of random number generation and very fast queries, if a blocking chain starts on any two sessions, then eventually the rest of the sessions will also call the stored proc that’s susceptible to blocking. You don’t want to hard-code the same values because then that relevant table data will end up getting cached in – some of my workload queries simulate blocking. If you wanted to get really fancy and test procs with lots of parameters, you’ll need to generate those in usp_RandomQ. This is handy because each of my stored procedures don’t have random number generators – they’re designed to mimic more real-world stored procs that have input values. (Oh, I wish it were.) All of the stored procs it calls will still show up in the plan cache, parameter – note that some of the stored procs take an For example, the stored proc GetBadgesDetails takes and uses that to look up a particular badge number’s details. The work involved with building this execution plan isn’t significant, and it won’t be the largest part of my workload. WITH RECOMPILE – I use this because I don’t want the usp_RandomQ stored procedure to show up in my execution plan stats. Here’s what mine looks like for one of my query tuning demos: Since SQLQueryStress will be calling this stored proc dozens of times at once, you’ll end up with a variety of different queries running simultaneously. (for example, if it’s divisible by 3, run sp_C, Based on the mod of that number, run a stored procedure.Declare an integer, and set it to a random number. Rather than calling a single query, call a “shell” stored procedure that runs other queries. As soon as I set the server and auth methods, the database list gets populated so I can set my default database: Setting up the connection stringīut you want to test more than one query at a time, right? You want to test a variety of different queries running all at once. In this instance, I’m pointing it at one of my Availability Groups, using Windows authentication. This is an oldie but goldie app that will run any one query thousands of times (or more) from dozens of sessions (or more), all from the comfort of your desktop: SQLQueryStress in actionĪfter you install it on your desktop (or a VM in the data center, whatever, just not the SQL Server you’re trying to load test), click the Database button to set up your connection string. Instead, let’s use the neato open source tool SqlQueryStress ( latest exe) to fake it. However, in the words of a timeless philosopher, ain’t nobody got time for that. In a perfect world, you want to exactly simulate the kinds of queries that the end users will be throwing at your SQL Server. Load testing – real, serious load testing – is hard.
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