m2m connections

The timeout has reached. The timeout time has reached, but the connection has not been obtained from the pool. This may occur because all pool connections are in use and the maximum pool size is reached. Solution1. Close the unclosed connection in the code.2. Expand the sharing pool as follows:The solution is to modify the connection life of the Connection Pool, because the default value is 60 seconds, that is, the time when the connection can be save

[Problem on line] "The number of Redis client connections has been down" solutionSome time ago, the new Redis cache Service was launched, ready to replace the Memcached.Why would you want to replace Memcached?The reason is that the business data is compressed list-type data , and the cache holds the latest 3,000 data . For the new data append operation , it needs to be disassembled into [get + unzip + append + Zip + set] 5 steps. If the list length is

Http://wiki.apache.org/HttpComponents/FrequentlyAskedConnectionManagementQuestions1. Connections in Time_wait stateAfter running your HTTP application, you use the netstat command and detect a lot of connections in stateTIME_WAIT. Now you wonder why these connections is not cleaned up.1.1. What's the time_wait state?The TIME_WAIT state was a protection mechanism

Document directory Disconnection timeout Connection refresh Multiple connections Improvement Example of network programming for Muduo: Timing wheel kill idle connections Chen Shuo (giantchen_AT_gmail) Blog.csdn.net/Solstice t.sina.com.cn/giantchen This is the eighth article in The Muduo network programming example series, which was originally intended to talk about file transfer. Here we insert a bi

Recently, our website often reports a 503 error: "HTTP Error 503. The service is unavailable ". But it is normal to brush one or two times. It is estimated that the maximum number of concurrent connections of the website is exceeded. What is an HTTP connection? When a page is loaded, images, styles, and scripts are used. Do requests for these items share one connection or multiple connections? Some people s

Optimized tomcat memory and connections and tomcat memory 1. Check the memory size that can be set by the system. Java-Xmx1024M-version (1024 indicates whether the memory can be adjusted to this value) 2. Set tomcat memory Add the following to the first line in the tomcat_home/bin/catalina. bat (win) or tomcat_home/bin/catalina. sh (linux) file: Set JAVA_OPTS =-Xms1024m-Xmx1024m 3. View tomcat memory usage Http: // 127.0.0.1: 8080/manager/status/(Note

When using the MySQL database, you often encounter a problem that is "Can not connect to MySQL server." Too many connections "-mysql 1040 error because the number of connections that have not yet been released to MySQL has reached the maximum MySQL limit. Typically, the maximum number of connections to MySQL is 100 by default, up to 16384.There are two ways to mo

How do I see the current number of MySQL connections in real time? 1, view details of all current connections:./mysqladmin-uadmin-p-h10.140.1.1processlist2, View only the current number of connections (threads is the number of connections):./mysqladmin-uadmin-p-h10.140.1.1status, view details of all current

#!/usr/local/bin/python3.5Import PymysqlImport timesum = 0While True:#open DB connectiondb = Pymysql.connect (' localhost ', ' root ', ' abc-123 ', ' test ')#use cursor ()cursor = Db.cursor ()#use execute () Run SQLCursor.execute ("Show variables like '%max_connections% ';")#USE Fetchone ()Max = Cursor.fetchone ()Cursor.execute ("Show global Status Like ' Max_used_connections ';")History_max = Cursor.fetchone ()Cursor.execute ("Show global Status Like ' threads_connected ';")currently = Cursor.f

The following articles mainly describe how to correctly check the number of MySQL connections and parse the actual application code for viewing the number of MySQL connections, the following describes the specific operation plan for the number of MySQL connections. I hope this will help you in your future studies. MySQLadmin-uiseeuon-pmtcera2009processlist-v to s