When building from source it is recommended to use BerkeleyDB 5.3 as this avoids wallet database incompatibility issues with the official release. The test_bitcoin-qt test executable fails on Linux ...

Using a value less than 30 seconds can alter performance because attribute caches for files and directories expire too quickly. nfsvers: Avoid using version 4.0 of NFS if possible. Use versions 3, 4.1 ...