1) Buffer Pool size now defaults to 1GB and a minimum of 64MB
2) Log files are 3 by default and each 128MB in size
3) Removed innodb-file-io-threads config variable since no longer used
4) Set read io and write io threads to 8 by default for better default performance
5) Set log buffer size to 16 MB by default and minimum to 2MB
6) Set additional memory buffer pool to 8 MB and minimum to 2MB
7) Set max dirty percent to 75% and decreased to 99% to never allow a completely dirty buffer pool
8) Increased io capacity to 200 for a good default