mysql query performance tuning

Alarm problem:Too many processes onZabbix Poller processes more than 75% busyZabbix unreachable Poller processes more than 75% busy1. The device that collects the data through the Zabbix agent is in the moniting state but at this time the machine freezes or other causes the Zabbix agent to die the server obtains the data, at this time unreachable pollerWill rise.2. The device that collects the data through the Zabbix agent is in the moniting state, but the server gets the data from the agent too

SQL Server Performance Tuning 3 (Index) MaintenanceHeat1 reviews Brook Stream GrassSQL Server Performance Tuning 3 (Index) MaintenanceObjectiveThe previous article describes how to improve the query performance of a database by b

, make sure that the goal of performance tuning From the most intuitive, most common point of view, mainly includes the following two points: Optimizing Response Time What is "Optimizing response time"? The popular point is that after tuning, the execution of queries, updates, and other operations, the database reaction faster, the time spent less. More commo

The JDK itself provides many convenient JVM performance tuning monitoring tools, in addition to the integrated VISUALVM and Jconsole, there are JPS, Jstack, Jmap, Jhat, Jstat and other small tools, this blog hope to play a useful, Let's start to understand the common tools for tuning JVM performance.In real-world enterprise Java development, sometimes we encounte

I believe many of my friends, whether engaged in development, architecture, or DBA, often hear the word "tuning. Speaking of "tuning", it may make many technical staff feel excited, or it may make many people feel distressed. Of course, there are also many people who despise this because not everyone is exposed to a large number of projects, and not everyone does have high

tuning tools provided by the database system itself, including several system stored procedures:Name feature Brief introductionSp_sysmon Enterprise-Class System performance reporting toolSp_lock View the Locksp_who View the activity of a threadQuery processing mode for sp_procqmode stored proceduressp_configure configure SQL Server system-level parametersSp_estspace estimate the space and time needed to cr

rich, powerful, and flexible, and you can do a variety of tasks with it, and in this article we'll discuss some tips for improving the performance of Linux servers.1. Tuning the Linux kernel elevator algorithm for disk I/OAfter selecting the file system, there are some kernel and mount options that may affect its performance, one of which is the elevator algorit

System Performance Tuning for CentOS servers Linux is an open-source operating system that supports various hardware platforms. Linux servers are world-renowned. The main difference between Linux and Windows is that, by default, a Linux server does not provide a GUI (graphical user interface) but a command line interface. The main purpose of the GUI is to efficiently process non-interactive processes. The r

the CPU, memory, and disk drive used by the database server. The second is to optimize the queries sent to the database. This article discusses hardware-side performance tuning. Query optimizations can be done through SQL commands such as CREATE INDEX, vacuum, vacuum full, ANALYZE, CLUSTER, and EXPLAIN. These are discussed in "Postgresql:introduction and Concept

the performance of ES. At the same time, assuming that the machine 1 has a routing attribute a document, Machine 2 has a routing attribute B document, then I in the query when the target route attribute is a, even if the machine 2 failure paralysis, the machine 1 structure is not a great influence, so do the query under the disaster situation also proposed a sol

Tags: Profiler Performance Performance Analyzer tuning performance calibrationSQL Server Profiler-performance tuningPerformance has enough reason to become a hot topic. Today's business is fiercely competitive, and if users think that an application is too slow, they will im

Tags: performance optimization slow query MySQL database tuning databasefirst, find slow query The last thing we do is to prepare for the occurrence of slow queries, which allows us to find slow queries and record them in a file .. 3. Record Slow queries At this point we

Label:Http://www.cnblogs.com/digdeep/p/4885948.htmlMySQL typically runs on Linux systems. Tuning for MySQL is generally divided into Linux OS-level tuning and MySQL-level tuning (and of course, architectural, business, application-level