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The mx500 is a SATA SSD, the 970 evo plus is NVMe - there’d be quite a big performance difference for sure.
If you're not upgrading to NVMe, then no, very little difference, if any.
yes im going from sata ssd to nvme ssd as said by @WSCallum
however people say that real world difference is minimal... so would it be a worthy upgrade?
Nope.
You’re probably not likely to notice the difference massively unless you’re constantly maxing the SSD already
i have using samsung 970 evo plus 500gb after samsung evo 860 500GB. it have better performance in day usage but if use it only for web browsing or office docs you will not seen much performance
just keep the mx500, its a solid ssd
Depends on what sort of load your databases subject the drive to. If the application is very read heavy with few writes, the database are well designed (good data layout and indexing strategy), the common data set easily fits in RAM, and you rarely report over a huge amounts of other data then you are unlikely to notice any difference what so ever.
IF you run replrts that scan through large datasets too big to fit in RAM, then you might notice a significant benefit from the raw throughput of NVMe (more directly connected to the PCIe bus) compared to something constrained by the SATA interface.
Performance of a decent NVMe (like Samsung 970) is much higher than from a decent SSD. Period.
That said, to answer the question whether your system and application would have a much better performance (both real and perceived by users) we'd need much more information than "it's a for MySQL server". The answer may range from "Nuh, hardly and faster" to "Wow, much, much faster".