1. Is it necessary to use 64G?
If you don’t run large applications, don’t have many installed packages, and don’t use virtual machines, it’s really not necessary.
But in addition to these uses, large memory will also be used by the system as a cache. Check the memory structure in Resource Monitoring. Although the memory utilization is only 4%, the cache actually takes up 56G!
Then, putting hot files into cache will not only improve system access and file access speeds, but also extend the life of the hard disk, nice!
2. Is it necessary to attend ECC?
The automatic error correction of ECC is suitable for the execution of long-term and large tasks. Once a memory error occurs, it will lead to unpredictable consequences or require re-execution. This scenario where the cost of errors is very high is very suitable for ECC.
3. Can it only support up to 32G?
Synology’s official website states that it can only be extended up to 32G, but this is not the case.
Executing the dmidecode -t memory command through the terminal found that Maximum Capacity: 64 GB
I purchased two Hynix ECC 32G and it was recognized normally when plugged in, and ECC was also in effect:
4. How to test memory
You can perform memory testing by using the tool on Synology’s official website Synology Assistant . This process is very long. The 64G memory ran all night and ended. The test results can be viewed in the log:
