Mysql Performance Question 4.1.22 vs 5.1.26.rc

Paul A. Procacci pprocacci at
Fri Aug 29 18:21:28 UTC 2008

Jim Pazarena wrote:
> I changed from 4.1.22 to 5.1.26.rc and my performance in a very busy db,
> tanked!
> could the use of an 'rc' possibly be my issue?
> is there any chance that the 'rc' has debugging enabled which is 
> slowing me down?

I've ran some tests just this past week (in fact I emailed 
freebsd-general about this yesterday), unfortunately however it was 
comparing performance between 5.0.51 and 5.1.26.

5.1 performs worse than 5.0 at higher workloads.  I'm unsure about 4, 
but am quite sure moving to 5.0 is probably the best decision you could 


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