All work

Implement system status variable to track duration of global read lock (Metadata lock) and the COMMIT lock

Implemeted TTL base cache eviction policy for "open table" and "table description" caches

Changing thread priorities Summary:To change os priorities of thread from mysql

Support for explicit snapshots

SQL to create and manage explicit snapshots

Enable/Disable Jemalloc with commandline argument

Print out stack trace of symbol names in one line to the error log

Port slow query log rotation

Add thread ID option for SQL SET command

Add more information to duplicate key error

Option to filter by table

Add option to mysqlbinlog to print encountered gtids on exit

Add filesort_max_file_size option

Periodic fsync in select into outfile controlled by sysvar

Introducing Transaction_seconds and a new I_S table Transaction_list

Add backward compatibility for "COMPRESSION=" options

Implemented a Monotonic Timestamp for Getting Sec Behind Master

relabeled threads in mysql and innodb via pthread_setname_np

Expose user certificate details to command line.

Group user network errors by error code.

Add stats to track network errors on the server side.

Port Optimizations for os_aio_thread_buffer to 5.6