4 ms·
"after rolling out our optimizations, we saw our error rates (ie. the proportion of slow or timed out queries) drop by up to 400%" There is some good shared kn
by introspectif 13y ago
"after rolling out our optimizations, we saw our error rates (ie. the proportion of slow or timed out queries) drop by up to 400%"
There is some good shared knowledge in the post (unlike this comment, to be fair), but what does drop by 400% mean?
If a rate drops by 100% it becomes zero. I get that.
If it increases by 400%, the outcome is slightly ambiguous (do we add 400% for 500% total or do we multiply up to 400% of the original value).
But a rate decreasing by 400% - am I the only person who finds that (not uncommon) expression hard to conceptualize?
- AsymetricCom 13y agoObviously, he gets -300% errors now.
- ihsw 13y agoThat's pretty good.
- erichocean 13y agoI understood it to mean that it had 1/4 the error rates they were previously seeing.
- apurvamehta 13y agoThis is exactly right :)
- caf 13y agoThen it dropped by 75%.
- apurvamehta 13y agoYes. It was a blunder. The post has been updated to reflect this.
- dllthomas 13y agoHuh, that's not even one I considered. I guessed 1/5, so the change was 4x the final value. Either way it's wrong - "dropped by X%" should be calculated as (original - final) / original.