Upgrade Synology DS1812+ Memory

As the Synology DS1812+ NAS officially only supports 3GB RAM, I used 3GB RAM NAS for many years.

Recently, I got one 1Rx8 4GB DDR3 RAM, wanted to try to see whether DS1812+ can use it.

After installed, luckily it is working. Plus 1GB on board memory, it has about 5GB memory now.

root@ds1812:~# free
              total        used        free      shared  buff/cache   available
Mem:        5072432      901144      323456       15908     3847832     3761546
Swap:       5140404      460920     4679484
root@ds1812:~# cat /proc/meminfo 
MemTotal:        5072432 kB
MemFree:          890332 kB
Buffers:            6104 kB
Cached:          3018256 kB
SwapCached:        29084 kB
Active:           662768 kB
Inactive:        2548468 kB
Active(anon):      94080 kB
Inactive(anon):   108664 kB
Active(file):     568688 kB
Inactive(file):  2439804 kB
Unevictable:        5804 kB
Mlocked:            5804 kB
SwapTotal:       5140404 kB
SwapFree:        4675032 kB
Dirty:             18444 kB
Writeback:          3860 kB
AnonPages:        188544 kB
Mapped:            76504 kB
Shmem:             15376 kB
Slab:             261456 kB
SReclaimable:      63788 kB
SUnreclaim:       197668 kB
KernelStack:       14400 kB
PageTables:        69604 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:     7676620 kB
Committed_AS:    4152632 kB
VmallocTotal:   34359738367 kB
VmallocUsed:      478460 kB
VmallocChunk:   34359221580 kB
DirectMap4k:       16876 kB
DirectMap2M:     5214208 kB
root@ds1812:~#