Hi Satendra, On Jul 14, 2014, at 3:48 AM, Satendra <stdra...@gmail.com> wrote:
> Hi there, I'm struggling to find the total time taken by a database query > on the disk? As I understand when a database query start execution it takes > some time inside the database engine & some time to seek the result from > disk (if that is not in cache/buffer) > > Can anybody from the group please suggest any clue about the execution time > on the disk? I have a performance_schema example demonstrating total IO wait time for a workload: http://www.tocker.ca/2014/02/18/todays-practical-use-case-for-performance-schema.html To prepare this data non-aggregated (per-query) is always a little bit difficult: - With select statements there is read ahead. - With write statements there is redo logging (which is grouped together with other statements). Maybe someone else on the list has better ideas on how to accommodate this? - Morgan -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql
