SQL 2017 performance, clustered vs non-clustered indexes 1.5 million records, time for a cursor?
Published: Sunday, January 13, 2019 written by Andy Flagg
View Count: 133
Keywords: performance, sql 2017, indexes, clusted, non-clustered
I am processing 1.5 million records and the index is not behaving correctly, and the two columns that are indexed seems awfully slow. what gives? drop index, create clustered index.
Now after 3 hours of testing, I should not post process, but in-process record column in line with record retrieval. so do a quick record update on 55,000 records and then drop and rebuilding indexes does not matter.
should i have looked at a post process cursor, but most say no, but then again, if the cursor would pull the record set nearly instantaneously, but it won't so, drop into a local or global temp table? hmmm... processing data is sort of crazy, but the goal is the questions to be asked of the database. focus!
more to come...
if you found this article helpful, consider contributing $10, 20 an Andrew Jackson or so..to the author. more authors coming soon
FYI we use paypal or patreon, patreon has 3x the transaction fees, so we don't, not yet.
© 2020 myBlog™ v1.1 All rights reserved. We count views as reads, so let's not over think it.