How to increase memory usage in MySQL server to improve?
Some of these values you can increase a long way (even two orders of magnitude) especially given your hardware. MySQL’s defaults are extremely conservative and seemed to be aimed at common mixed-use desktops of about ten years ago. Oh, and be warned that the 32-bit version will have trouble using more than 2GB of RAM.
When to use less than 90% of memory in MySQL?
There are cases when MySQL should use significantly less than 90% of memory: If there are other important processes running on the same server, either all the time or periodically. If you have heavy batch jobs run from cron, which require a lot of memory, you’ll need to account for that.
When to kill MySQL due to out of memory error?
If you’ve made a mistake in the MySQL configuration, or you have some rogue process taking much more memory than expected, it is usually a much better situation to lose performance due to a swap then to kill MySQL with an out of memory (OOM) error – potentially causing downtime.
How much memory does MySQL 32 bit use?
MySQL’s defaults are extremely conservative and seemed to be aimed at common mixed-use desktops of about ten years ago. Oh, and be warned that the 32-bit version will have trouble using more than 2GB of RAM. Look in the MySQL Manual for more information and guidance.
How much memory does MySQL use per disk?
I have a Windows 2008 server with 8GB of RAM running IIS7 and MySQL. I’ve been tracking the memory, cpu and disk usage on the server and I found out that MySQL is using only 250MB of RAM, keeping the disks very busy, even though I have plenty of free ram laying around.
Why is MySQL using so much free memory?
Sometimes it appears that your server’s free memory runs low because MySQL is using more memory than you want it to. Well, one does not simply tells MySQL how much memory it should use.
Is it good to swap out memory in MySQL?
It is fine to have some used space in your swap file, as there are probably parts of the operating system that are unused when MySQL is running, and it’s a good idea to swap them out. What you don’t want is constant swapping going on during the operation, which is easily seen in the “si” and “so” columns in the vmstat output.