latency checker

MySQL Master/Slave latency monitoring script (pt-heartbeat), mysqlpt-heartbeat We can use percona's powerful weapon pt-heartbeat to monitor the master-slave replication latency of MySQL databases. Pt-heartbeat updates a specific table in the master database by using a timestamp. Then, it reads the updated timestamp from the slave database and compares it with the local system time to get its

Monitor MySQL Master/Slave synchronization latency There are usually two ways to monitor the latency between MySQL master and slave: Seconds_Behind_Master and mk-heartbeat. Method 1: monitor the value of the Seconds_Behind_Master parameter output by the show slave status \ G command to determine whether there is a master-slave latency. Show slave status; # The re

I'll translate. These days, 2X transistors! = 2x faster programs. more transistors = = more cores, but software have not evolved to being able to fully utilize more cores. Because Software today isn't able to adequately put multiple cores to work, the hardware guys was not going to keep putti ng more cores in. The cycle is sputtering.A Long term goal of Go are to reboot this virtuous cycle by enabling more concurrent, parallel programs. In the shorter term, we need

Analysis of slave monitoring latency in MySQL, mysqlslave In the MySQL replication environment, we usually judge the SLAVE latency only based on the value of Seconds_Behind_Master. This is acceptable in most cases, but not accurate enough. More factors should be considered. First, let's take a look at the SLAVE status: Copy codeCode: yejr@imysql.com [(none)]> show slave status \ G* *************************

In May 7, IBM announced the expansion of IBMDB2AnalyticsAccelerator, a popular product, along with a set of temporary hotfix (PTF) and numerous document changes. These changes will be made to the user during October 1 and October 1, with multiple expected features added, such as reducing data latency and extending the product storage capacity to more than 1 In May 7, IBM announced the expansion of IBM DB2 Analytics Accelerator, a popular product, alon

Generally, the masterslave Mechanism Based on LAN can meet the requirements of rsquo, real-time rsquo, and backup. If the latency is high, confirm the following factors: Generally, the LAN-based master/slave mechanism can meet the requirements of rsquo, real-time rsquo, and backup. If the latency is high, confirm the following factors: Generally, the master/slave Mechanism Based on LAN can meet the requ

This article is translated from Niraj Bhatt performance Testing-response vs. Latency vs. Throughput vs. Load vs. Scalability vs. Stress vs. Stres S vs. robustness. Original address: https://nirajrules.wordpress.com/2009/09/17/ measuring-performance-response-vs-latency-vs-throughput-vs-load-vs-scalability-vs-stress-vs-robustness/Usually I find that when people talk about performance tests, they are always va

Oracle Foreign keys only have cascade deletion and no Cascade update, but sometimes such functions may be required in the system, so the implementation process is recorded here. There are two constraints in Oracle: latency constraint and non-latency constraint. The so-called non-Delay Constraint means that when a record is changed, it will immediately check the constraints and check whether the modificati

Traffic, latency, and time series traffic in FPGA design: The data bit that can be transmitted in each clock cycle. Time delay: the clock period that data goes through from input to output. time sequence: The maximum latency between two components. It determines the maximum clock speed of the system. 1 pipeline can increase the traffic, for example, computing x ^ 3, Iterative StructurePipeline: Traffic = 8/

This article mainly introduces the latency analysis of slave monitoring in MySQL, which is mainly used in the MySQL replication environment. If you need it, you can refer to the MySQL replication environment, we usually only judge the SLAVE latency based on the value of Seconds_Behind_Master. This is acceptable in most cases, but not accurate enough. More factors should be considered. First, let's take a l

Oracle Foreign keys only have cascade deletion and no Cascade update, but sometimes such functions may be required in the system, so the implementation process is recorded here. Oracle Foreign keys only have cascade deletion and no Cascade update, but sometimes such functions may be required in the system, so the implementation process is recorded here. Oracle Foreign keys only have cascade deletion and no Cascade update, but sometimes such functions may be required in the system, so the

When it comes to latency in the program, how do you think about it and start a new thread? If my program only uses a single thread, but wants the function to wait for 10 seconds to return the value, and cannot process other messages as if I used the sleep function? Here I will summarize several latency methods that can be seen in the Forum. In addition, I am not responsible for studying other people's sourc

Subtotal on MySQL Master/Slave latency I have encountered several MySQL master-slave latency issues recently, and some of my colleagues complained about this. Sort it out a little bit. ------------------------------------ Body ------------------------------------ Two scenarios with problems: Scenario 1: it takes about 10 minutes for the master database to perform the alter operation. It also takes about

Just this morning, my system's network request latency was up to 544 milliseconds to 6937 milliseconds. And this is on an activated network interface. This can take an additional 10 seconds if the interface is activated from power-saving mode. So in order to provide a good user experience, the app needs to consider at least more than 10 seconds of network latency.If the app initiates a user authentication request, only the successful user can enter th

Using pt-heartbeat to monitor the replication latency of MySQL, pt-heartbeatmysql Pt-heartbeat During database master-slave replication, whether the replication status and data delay are normal is a critical indicator. How can we monitor it? Pt-heartbeat is a centralized tool developed by PERCONA to monitor replication latency of MySQL and PostgreSQL. Mature, such as Uber and other large companies. I will n

Tags: blog technical description off-line rpm package download RPM PAC Water TransferUse the QPERF command to test network bandwidth and network latency under LinuxIf no command can be installed with Yum, the command is as follows:#yum-y Install QperfIf there is no yum or no network, install the following RPM package in turn, this test is done on the CENTOS6 version, the package used is also version 6,Download RPM Package Address: Centos6/redhat6 http

This is a creation in Article, where the information may have evolved or changed. We have a module that is sensitive to latency, which requires access to another machine on the network to fetch a timestamp. To implement a distributed transaction, you need to perform this operation two times, and if the time stamp is slow, the latency of the entire transaction will rise. In theory, the intranet environment i

In many systems, users are allowed to set a single message processing mode or batch mode. For example, in storm, the user can write through the core and Trident two APIs, the difference being that the former is a tuple that is processed in a tuple, and that the latter is a batch that consists of multiple tuples, and then one batch is processed by batch.Because of the differences in the two processing modes, the performance of both is different, such as throughput and

Flashtec NVRAM accelerator achieves 15 million iops at a latency of several microseconds Enterprisetech PMC has recently provided a brand new product for very large-scale data center operators and enterprise-level storage vendors to help them build more avant-garde storage infrastructure. PMC was founded thirty years ago. As an industry-recognized semiconductor company, it previously specializes in communication equipment and has entered the enterpri

Muduo network programming example 5: measure the network latency of two machines Chen Shuo (giantchen_at_gmail) Blog.csdn.net/solstice t.sina.com.cn/giantchen This is the fifth article in The muduo network programming example series.Article. Muduo full article list: http://blog.csdn.net/Solstice/category/779646.aspx This article introduces a simple networkProgramRoundtrip, used to measure the network lat