postgresql performance tuning parameters

overview of the various options with links to the relevant documentation. This article assumes that the reader has a basic understanding of the Nginx architecture and configuration concepts, so it is not a simple copy of an Nginx document, however, an overview of various options and links to relevant documents are provided. A good rule to follow when doing tuning is to change one setting at a time and if it does not result in a positive change in

options with links to the relevant documentation. This article assumes that the reader has a basic understanding of the nginx architecture and configuration concepts, so it is not a simple copy of an nginx document, however, an overview of various options and links to relevant documents are provided. A good rule to follow when doing tuning is to change one setting at a time and if it does not result in a positive change in

Redis Performance Tuning: Save the effect of SNAPSHOT on performance, redissnapshot Some time ago, the Development Environment reported that access to the Redis server was very slow, and each request took several seconds. 2 ~ This will happen again in three days. I checked the Linux performance and there is no problem.

Association. The benchmarksql in this test set up 1000 warehouses with simulation operators and simulated 5 businesses, namely new orders, payments, order status, shipping and inventory.The overall test environment is as follows:Server: Dell PowerEdge r730xd, 2 Intel xeone5-2620 (6 core) v3 CPU,32GB DRAMstorage Devices: 1 x Memblaze 1.6T PBlaze4 PCIe SSD 6* 600GB 15K + 1 * 300GB 15K HDD LSI SAS-3 3008 RAID Fury Test Tools: Benchmarksql 4.1.1,po

SQLServerProfiler-performance tuning has enough reason to become a hot topic. Today's fierce competition in the business field, if users think that an application is too slow, they will immediately turn to another vendor. To meet user requirements, SQL tracking loads some event classes, which can be used to find and debug performance bottlenecks.

below: The total number of instances created on the left, the structure of the instance on the right, and the reference description below, which can be seen in the class Cyclicdependencies and referenced by HashMap.This can determine the location of the leak, and then according to the actual situation to analyze and solve. JVISUALVM remotely monitor Tomcat 1 and modify the remote Tomcat's catalina.sh profile, where it adds: java_opts="$JAVA _opts -djava.rmi.server.hostname=192.168.

When it comes to MySQL tuning, there are a lot of points that we can do, so combing, some tuning strategy, today just summarizes the tuning of server parametersActually speaking, the parameter tuning, my understanding is nothing more than two points: If it is InnoDB database, innodb_buffer_pool_size to open as

According to the tradition, parameters and settings of different Linux distributions and kernels have been changed, so that the system can achieve better performance. The following section describes how to use the following techniques to optimize performance in Red Hat Enterprise Linux AS and suse linux Enterprise Server systems: QUOTE: 1. Disabling daemons (disa

For Linux system tuning parameters, all TCP/IP tuning parameters are located in the/proc/sys/net/directory. For example, the following are some of the most important tuning parameters, and their meanings are as follows: 1./proc/sy

overview of the various options with links to the relevant documentation. This article assumes that the reader has a basic understanding of the Nginx architecture and configuration concepts, so it is not a simple copy of an Nginx document, however, an overview of various options and links to relevant documents are provided. A good rule to follow when doing tuning is to change one setting at a time and if it does not result in a positive change in

The method of performance tuning for Linux operating system 2013-03-18 15:35 Honestqiao Chinaunixfont Size:T | T Linux is a free-to-use and free-to-propagate Unix-like operating system, with different Linux distributions and different kernels making changes to the parameters and settings, allowing the system to achieve better

excerpt from: http://uule.iteye.com/blog/2114697Summary of JVM garbage collection and performance tuningSeveral strategies for tuning the JVMFirst, JVM memory model and garbage collection algorithm1. According to the Java Virtual Machine specification, theJVM divides the memory into: New (Young Generation) Tenured (old generation) Permanent generation (Perm) Where new and tenured belon

Here and you to share the JVM parameter tuning eight experience, JVM parameter tuning, this is a headache problem, bad settings, the JVM is constantly executing FULLGC, resulting in the entire system becomes very slow, the site can be stagnant for more than 10 seconds, I believe that through this study you have a new understanding of the JVM parameter tuning.Examples of eight experiences on

Tuning OverviewMost spark job performance is mainly consumed in the shuffle link, because this link contains a lot of disk IO, serialization, network data transmission and other operations. Therefore, if you want to make the performance of the job to a higher level, it is necessary to tune the shuffle process. But it's also important to remind you that the factor

Tuning OverviewMost spark job performance is mainly consumed in the shuffle link, because this link contains a lot of disk IO, serialization, network data transmission and other operations. Therefore, if you want to make the performance of the job to a higher level, it is necessary to tune the shuffle process. But it's also important to remind you that the factor

PostgreSQL vacuum Principle 1 Functions and Parameters From the previous article "PostgreSQL MVCC source code implementation []", we know that PG does not store the old version of undo like Oracle, but directly stores the old version in the relation file. The problem is that there are too many dead tuple files, resulting in increasing relation files and space exp

, you should increase the value of both Acceptcount and MaxThreads . 5,enablelookups= "false": whether to turn on the domain name counter-check, generally set to false to improve processing power, its value and true, is rarely used. 6,maxkeepaliverequests= "1":nginx Dynamic transfer to Tomcat,nginx is not keepalive, and the Tomcat side of the default open KeepAlive,Will wait for keepalive timeout, default is not set to use ConnectionTimeout. So you must set the Tomcat timeout and turn off Tomc

third-party applications running on Linux, there are many performance tuning techniques that can help you improve the performance of your Linux servers and lower your operating costs.14. Correct configuration of MySQLTo allocate more memory to MySQL, you can set the MySQL cache size, and if the MySQL server instance uses more memory, reduce the cache size and in

MySQL configuration parameter OptimizationThis article comes from Dawson study notes, copyright http://wubx.net/AllMyISAM Storage Engine OptimizationThe parameters involved are as follows:Key_buffery_sizeConcurrent_insert = 2 | WaaysBulk_insert_buffer_size=8mMyisam_recover_options=forceMyisam_recover_threads=1myisam_sort_buffer_size=1gParameter explanation:key_buffery_size It is mainly used to store the index information of the MyISAM table, and

Talk about linux performance tuning 12: Red Hat optimization strategy Tuned talking about linux performance tuning 11: Memory Allocation Management http://www.2cto.com/os/201307/228761.html A dynamic tuning solution launched by RedHat allows you to use different