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How many CPU cores does MySQL server use?
MySQL server uses only 1 out of 48 CPU cores with GROUP BY queries
Is it possible to make MySQL use more than one memory?
If the Unix top tool or the Windows Task Manager shows that the CPU usage percentage with your workload is less than 70%, your workload is probably disk-bound. Maybe you are making too many transaction commits, or the buffer pool is too small. Making the buffer pool bigger can help, but do not set it equal to more than 80% of physical memory.
How many CPU cores does one connection use?
Aside from background threads, one connection will use only one CPU core. The applies to GROUP BY, UNION, PARTITION, and anything else you might think it should manage to do in parallel. The statement applies for InnoDB at least through MySQL 8.0 and MariaDB 10.2.
How many CPU cores are used in group by query?
I’m bit surprised that when executing queries with GROUP BY, no matter how I format my query I get only 1 CPU core used for that query, clearly illustrated by htop output
How many cores are used in ndbmtd process?
When I use following configuration I expect both cores on our server with Intel (R) Pentium (R) CPU G6950 @ 2.80GHz will be fully utilized. Unfortunately this is not happening. Only core with id=0 is used. Second one has no load. However, “top” shows 90% usage for ndbmtd process (why?)
How to take advantage of multiple CPU cores?
My current set up is the following : 2 x Dual Quad Core for MySQL Heads raid 10, 15k RPM SAS drives 8G memory 6 x Dual Quad Core for Data Nodes raid 10, 15k RPM SAS drives 16G memory The problem I see is that the ndbd and mysqld processes SEEM to only use one core on each of the machines. Am I correct?
How do you make good use of multicore CPUs in your PHP?
The MySQL server is multi-threaded, which means it can use several distinct cores to answer several concurrent requests — even if each request cannot be served by more that one core. And, if you think your pages are taking too long to generate, a possible solution is to separate your calculations in two groups :