How are simultaneous queries handled in a MySQL server?
Queries are always handled in parallel between multiple sessions (i.e. client connections). All queries on a single connections are run one-after-another. The level of parallelism between multiple connections can be configured depending on your available server resources.
What is the maximum number of concurrent connections to MySQL?
My app can have at most 10,000 users. What is the maximum number of concurrent MySQL connections possible? You’d probably run out of memory, file handles, and network sockets, on your server long before you got anywhere close to that limit. You might have 10,000 users total, but that’s not the same as concurrent users.
How many concurrent users can a database have?
You might have 10,000 users total, but that’s not the same as concurrent users. In this context, concurrent scripts being run. For example, if your visitor visits index.php, and it makes a database query to get some user details, that request might live for 250ms.
Why are parallel queries so slow in MySQL?
However, if they don’t block each other, they can still slow each other down by consuming resources. IO operations are a particular source of these slow-downs. If your data don’t fit in memory, you should really limit the number of parallel queries to what your IO subsystem can handle, or things will get really bad.
When to accept more connections in MySQL server?
In a situation when there are many connections and all connections are very busy we say that the MySQL server is under heavy load. When connections are less busy one can accept more connections. Let us say a given server instance is maxing out on 5000 TPS for a user load over 200 connections.
Where does MySQL send a connection request to?
The MySQL Clients send connection requests to the MySQL Server. A connection request is simply a TCP-IP connect message sent to port 3306 on the server host machine.