elasticsearch query performance tuning

loss. Summarize: The read and write locks of the MyISAM storage engine are mutually exclusive and read-write operations are serial. When a process requests a read lock on a MyISAM table, and another process requests a write lock on a table, MySQL is the write process that first obtains the lock, not only that, even if the read request is first to the lock waiting queue, the write request is followed, and the write lock is inserted before the read lock request. This is because MySQL considers wr

EPEL repository. This tool is definitely an old-fashioned tool, but it is very easy to use, and it also has a wealth of plug-ins for use. When you install and use Munin, many graphical tools are installed by default. If you need more graphical plug-ins, you can find them on the contrib repository. For some more advanced monitoring tools, Elasticsearch, Logstash, and Kibana are more popular in log analysis and visualization. Set ELK to load the data t

Tags: function performanceAbstract: Reproduced from Xiaorui some users (especially the external output) when using Maxcompute (original ODPs), due to the use of the product level and the level of understanding of the implementation of different degrees, resulting in the implementation of the task is too long, the occupation of more cluster resources; serious causes failure, Not only need to input support students to help solve the problem, but also affect the user's normal business. Consolidatio

. When a query is executed, SQL Server does not read more or less data than is actually required, so when executing the same query on the same dataset, the resulting logical read numbers are always the same.Why is it important to know the logical read value of SQL Server when executing queries in tuning query

Introduction: 2 database servers, one instance per server, one instance has one library, 2 databases fail each other, and the maximum memory is set to 50% of physical memory, but due to the increase in load caused by the memory shortage problem: In the previous 2000, the database does not respond to the system's memory pressure, So only set 50% to ensure memory balance is used, but 4. Sun will introduce new APIs to tune MySQL performance Profile: acc

This article mainly describes how to locate the performance problems of the Site Based on some simple tools and Simple phenomena. The topics in this chapter are as follows: General performance tuning process Analyze page loading information using analysis tools Analyze performance bottlenecks using analysis tools

MYSQL Performance Tuning and architecture design-instance analysis of factors affecting MYSQL Performance Requirement overview A simple discussion zone system requires users, user groups, and group discussion areas. Brief analysis 1) tables that need to store user data; 2) tables that need to store group information and user-group relationships; 3) tables that ne

the data to be monitored, use Topbeat as the resource usage measurement standard, use Filebeat as the real-time Log File Analysis, and use Packetbeat to analyze online network data. There are many optional tools, such as what you know, what you like, or what you want to learn. The most important thing you need to remember is to make sure that you know your benchmark data before you start the modification operation. Performance