计算查询执行时间

Question

I have aa table of questions in my database here are column and data types of questions table

Field           Datatype
QID             BIGINT
UserID          INT(11)
Question        VARCHAR(100)
Description     Text
Date            DateTime
Status          TINYINT

this table is expected to have around 2 Million entries my question is how do i calculate query execution time if i am searching a record based on QID, UserID or Question.

Answer 1

You can use the General Query Log but it has certain disadvantages too so think before running it on some production environment.

You can use it like:

SET profiling = 1;

and then execute your query like

SHOW PROFILES;

EDIT:-

I dont know if that is the best approach to go with but here it goes as it may depend on the CPU and the number of processes running on your system:

declare @start timestamp
declare @stop timestamp

set @start = select NOW();
//Your query
set @stop = select NOW();

Execution time = @stop - @start

Answer 2

Afaik you can only find out number of block accesses but calculating query execution time would be impossible you can only estimate it because you never know how many processes will be executing on your actual hardware and that's why you have no way to calculate for how long will processor serve your process only.

To find out number of block accesses follow first answer of this question best explanation i guess