Comments on: How Much CPU Is Enough? https://thomaslarock.com/2009/09/how-much-cpu-is-enough/ Thomas LaRock is an author, speaker, data expert, and SQLRockstar. He helps people connect, learn, and share. Along the way he solves data problems, too. Tue, 08 Sep 2009 15:00:01 +0000 hourly 1 https://wordpress.org/?v=6.7.1 By: Jane in London https://thomaslarock.com/2009/09/how-much-cpu-is-enough/#comment-965 Tue, 08 Sep 2009 15:00:01 +0000 http://thomaslarock.com/?p=2802#comment-965 Just realised I never got back to you about the replication/mirroring thing (mostly because I was Doing What I Was Told at that point).

In my previous position, I had a server running SQL and MIIS, and it was generally running at about 95-99% CPU, and was in perpetual danger of total collapse: SQL was taking the vast majority of that CPU, and it really needed rebooting once a week.

75% usage 75% of the time would have been rather dreamlike…

]]> By: Thomas LaRock https://thomaslarock.com/2009/09/how-much-cpu-is-enough/#comment-964 Sat, 05 Sep 2009 00:13:44 +0000 http://thomaslarock.com/?p=2802#comment-964 In reply to Matt Silva.

i would imagine the same would be true for most any line of business, with the exception of a few departments within.

]]> By: Thomas LaRock https://thomaslarock.com/2009/09/how-much-cpu-is-enough/#comment-963 Sat, 05 Sep 2009 00:12:48 +0000 http://thomaslarock.com/?p=2802#comment-963 In reply to Buck Woody.

not a bad guide to follow. seems simple enough especially if you know going in that you will never get it perfect.

]]> By: Matt Silva https://thomaslarock.com/2009/09/how-much-cpu-is-enough/#comment-962 Sat, 05 Sep 2009 00:05:04 +0000 http://thomaslarock.com/?p=2802#comment-962 I simplified the problem for the sake of brevity, but in short – the 30 days are almost identical across the main line servers. The only consolidation could be with test servers – since little testing is done during the busy season.

]]> By: Buck Woody https://thomaslarock.com/2009/09/how-much-cpu-is-enough/#comment-961 Fri, 04 Sep 2009 23:56:07 +0000 http://thomaslarock.com/?p=2802#comment-961 Lazy Response from Buck: 75% usage for 75% of the time. THat’s back from my mainframe days.

]]> By: Thomas LaRock https://thomaslarock.com/2009/09/how-much-cpu-is-enough/#comment-960 Fri, 04 Sep 2009 23:41:10 +0000 http://thomaslarock.com/?p=2802#comment-960 In reply to Jack Corbett.

Jack,

How long would you want perfmon to collect stats for? a week? a month? a year?

good question about those 30 day spikes. i suppose if you knew which 30 days you could overlay them with servers that did not spike on the same days, if possible.

]]> By: Jack Corbett https://thomaslarock.com/2009/09/how-much-cpu-is-enough/#comment-959 Fri, 04 Sep 2009 20:59:46 +0000 http://thomaslarock.com/?p=2802#comment-959 Interesting post especially because I have recently been asked by a former employer about consolidating several SQL Servers to one server for this reason.

My recommendation was to get a good set of perfmon stats and then determine how many of the servers they could consolidate.

I know I’d prefer to keep the average no higher than 50% just so you can handle those spikes.

Matt,

If you have several servers and those 30 days are all different days, could you then consolidate?

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