postgresql performance metrics

Before introducing the disk I/O monitoring command, we need to understand the disk I/O performance monitoring metrics, as well as the disk performance of each indicator. Disk I/O performance metrics include:Metric 1: I/O per second (iops or TPS)For a disk, the continuous rea

Server monitoring?? In addition to deploying WebApp, you need to monitor the service's exception information and server performance metrics when building the server, and notify the administrator of any exceptions.?? The server was built using Linux+nginx-1.9.15+tomcat7+java.?? Write scripts to detect error logs and server performance

Label:Original: SQL Server Automation Operations series-Monitoring Performance metrics script (Power Shell)Requirements DescriptionGenerally in the production environment, sometimes need to automatically detect the status of the indicator value, if there is an exception, need early warning, such as e-mail notification, this article is introduced if the power shell to achieve status value monitoringRange of

Tags: ber write amp order parameter IO performance HDD persistence anotherThis article focuses on common metrics for using Performance Monitor to monitor SQL Server under Windows, including the buffer Cache hit Ratio, pages/sec, Available Bytes, Disk Time, AVG. Disk Queue Length, Processor time, Processor queue Length, etc. 1.SQL Server buffer:buffer Cache hit Ra

for memory use, so as not to cause frequent GC (garbage collection mechanism) impact performance and large object application memory overflow; On the other hand, we need to release memory in time to avoid a memory leak.ElectricityMobile devices have very limited battery power relative to the PC, which is especially important to maintain long-lasting endurance. In addition, many features of Android are more power consumption (such as screen, Gps,senso

. The memory resources of the mobile device are very limited, and the private memory allocated for each app process is limited. On the one hand, we should reasonably apply for memory use, so as not to cause frequent GC (garbage collection mechanism) impact performance and large object application memory overflow; On the other hand, we need to release memory in time to avoid a memory leak.ElectricityMobile devices have very limited battery power relati

The generalization performance of the learner is evaluated. In the measure, we should have the evaluation criterion to measure the generalization ability of the model. Performance metrics reflect task requirements, and using different performance metrics often leads to diffe

dbcommandinterceptioncontext , let's call the context of the Listener SQL command, and we'll see what this class contains. As follows: In this class there is an important attribute UserState , oh, meaning the user state, according to the summary information, we can set the information we operate, but also a type of object, it seems to be conducive to the conversion between the object. Next go to the topic, how do we judge SQL performance

First look at a diagram:Note: The right image is often used in our workWhat are the Web performance metrics we focus on?1. Page load timeThe time to load from the page to the page onload event firing. In general, the OnLoad trigger represents the CSS,JS directly from the HTML reference, and the picture resource is fully loaded.2. Full page load timeFull page load time refers to the time that the network act

tcpdump to grab the packet, when the problem is reproduced (such as the log display or a state appears), you can end the capture, and the tcpdump itself with-c/-w parameters, you can limit the size of the crawl packet storage file, When this limit is reached, the saved packet data is automatically rotate, so the total number of packets is still controllable. After that the packet took off the line, with Wireshark want to see how to see, not happy! Tcpdump Although there is no GUI interface, but

Redis Performance Metrics monitoring commandsIn the process of learning, we must learn to use help frequently to understand the specific use of commands.1.info (monitoring typically uses this command to read data)127.0.0.1:6379> Help InfoINFO [Section]Summary:get information and statistics about the serversince:1.0.0Group:server127.0.0.1:6379> Info# Serverredis_version:3.0.7redis_git_sha1:00000000redis_git_

Tags: MySQL performance metrics statistics--Generate report file to/tmp directoryTee/tmp/mysql_performance_stat.txt--Statistical performance indicators to open the following parameters, which uses the IS database to hold database information, due to the use of PS library storage there is still a bug, information statistics are not completeShow variables like ' sh

If all of the internal technical factors are left behind, we only look at the performance metrics of the application, so generally speaking, the performance of the program can be measured in the following ways. N Response Time: The time the system responds to user behavior or events. The shorter the response time, the better