WebJan 7, 2024 · MySQL 8 Select Count(*) is very slow: Submitted: 20 Nov 2024 13:03: Modified: 7 Jan 2024 14:37: Reporter: Vivek Texeira: Email Updates: Status: Can't repeat : … 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 …
Bug #101886 select count(*) very slow on windows mysql server
WebJul 29, 2024 · Faster counting by leveraging indexes. This basic query for counting is slow with PostgreSQL and MySQL/InnoDB: SELECT COUNT (*) FROM my_table; There is another way to think about count queries, though. Consider a table with a primary key of id. The above query could also be written as: 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 … does utc time observe daylight savings
How to Make SELECT COUNT(*) Queries Crazy Fast
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. 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 … WebMar 24, 2024 · The first problem after migration is: a count(*) over 100'000 records takes 15 seconds. Inf 5.7 it tooks about 0.1 second. after testing an comparing i found out that it has nothing to do with the record number (same result with just 2 records),but adding an extra index to the primary key field (id) helped. does uterine cancer show up on ultrasound