mysql writes per second

Label:-show Global Status where Variable_name in (' Com_select ', ' com_insert ', ' com_delete ', ' com_update '); Query The total number of current four operations X1 Y1 Z1 W1 --select Sleep (max) 60 seconds Delay --show Global Status where Variable_name in (' Com_select ', ' com_insert ', ' com_delete ', ' com_update '); total number of four operations in one minute X2 y2 Z2 W2 Count the number of operations per second queries

Tags: SQL total increment statistics MySQLExample: A user table has a user_id self-increment primary key and Create_timeBusiness requirements allow you to count the total number of users per day and the amount of user increase compared to the precedingTable two this.First of all, the total number of daily to detect the time in the table is generally date_time type, so use a functionSELECT date_format (create_time, '%y-%m-%d ') dd,count (*) num from th

Tags: syntax order cas index comm font help row lessMySQL time-per-hour record number scheme 1:? 1234567 SELECT@rownum := @rownum + 1 AS ID,CONCAT((CASE WHEN t.hour = 24 THEN 0 ELSE t.hour END),‘:00:00‘) AS TIME, COUNT(*) AS COUNTFROM (SELECT id, HOUR(DATE_FORMAT(createtime,‘%H:%i:%s‘))+1 AS HOUR FROM baby WHERE DATE_FORMAT(createtime,‘%Y-%m-%d‘)=‘2016-10-16‘) t,(SELECT @rownum := 0) rGROUP BY TIME ORDER BY ID//这个计数, 是LESS THAN TIME的计

, separating the reading and writing pressure of database3, using proxy server and Web cache server technology such as squidPS: Because of the space problem, I simply say some basic concepts, in fact, each of the knowledge points related to a lot of content. Especially in the first stage, many programmers who have worked for several years are not fully understood. I think to really understand the index, the best way is to 1000w-more than billions of data, the test SQL statement, and then combine