WebJan 7, 2024 · Adding WHERE id > 0 as suggested above reduces the query time to 0.2 seconds. So there is definitely a bug in MySQL 8. Testing the same table on a much … WebLook at this section in our previous article (Buy a fast server Look at items four through six); a fast summary is that you shouldn’t use mechanical hard drives, and a dedicated server is faster than a cloud instance.Measuring MySQL query performance. Measuring MySQL performance was also covered in the previous article.
How to Make SELECT COUNT(*) Queries Crazy Fast
WebMay 4, 2007 · Hi I’m using this kind of queries in mysql in InnoDB engine Select count(*) from marking1 where persondate between ‘2007-04-23 00:00:00.000’ and ‘2007-04-23 23:59:59.999’ and PersonName=‘aaa’ While executing these queries from front end VB, It takes above 5 secs with 50 thousand records. How can I improve speed for this kind of … WebDescription: when i connect mysql server for windows on my laptop, the select count(*) is very slow, so i created 100 thousands rows data, it's runed 13s.i tried most times, always this. the server version is 8.0.22. but the same data, on server for linux, less than 1s. version is 8.0.22 too. then i connect mysql server for windows on my desktop, server version is … gas which smells like rotten egg
Mysql Why is the count(*) performance very fast after locking a …
WebFeb 23, 2024 · Don’t Count All. Yup, Count(*) very very slow if you have a lot of rows in the database. 1 Millions still ok, ... Select count(id) from table where indexed_column = 1; ... The benchmark between MySQL 5 and 8 which MySQL 8 give huge difference in the time it takes to process transactions and improvement in high workload. WebAug 23, 2024 · Without it, it runs blazing fast. I made sure to add indexes on all the columns used to perform the JOINS. If I extract the COUNT subquery to its own query, it is also really fast: SELECT i.ItemID, COUNT ( Equipment.EquipmentID ) FROM Equipment INNER JOIN Item i on i.ItemID = Equipment.ItemID INNER JOIN EquipmentDesignation_Vw ON … WebMar 24, 2024 · I posted to fast: i did a reeimport of the database, added the index and this time it did not help: still 15 secodnds to count the records. i discovered another strange … david\u0027s mighty men list