Transmission add-on crashing on ReadyNas Duo

for the "cache-size-mb", you should set it to 2, not 2mb, but apparently, Transmission doesn't mind much if it's running. The "~" means "about", you can try increasing it to 4 or maybe even 8 to increase the download speed. A higher number means less writes to the disk, which results in faster download. But it also means that it will be short on ram memory quickly and start swapping to the disk, which will result in slower downloads again and might result in Transmission crashing.

The "cache-size-mb" is the maximum cache used per peer, so if you are downloading from 50 peers, and it is set to 4MB, you will use up 200MB of ram for caching. The Duo only has 256MB, so if it has much other stuff running, the memory will be full quickly. If you set the cache size to 8MB, Transmission will want to use 400MB of ram, which the Duo doesn't have, so the swap will be used. If 240 peers with 2MB each worked in 2.22 and it doesn't work in 2.42, then apparently, there's a problem with running Transmission while swapping a lot.