Use zabbix to monitor latency of international linesIn many cases, the lines of various manufacturers in China are unstable, but they can only be tested temporarily. No detailed statistics are provided. Here, zabbix is used to collect statistics under this record.Trigger can be used for alarm when you are concerned about latency1. Compile the zabbix monitoring script. The following uses monitoring the Hong Kong server as an example:
#! /Bin/bash
In-depth analysis of network latency during Android boot
In general, the property of phone is persistent to true, and the phone process is called up earlier. Applications modified by android: presistent will be started by AM after the system is started, even if they are not running, AM also calls startProcessLocked to start the process. Start package com. android. phone, that is, phone application. This will directly call onCreate () of PhoneApp and e
reuse of data. Reusing data while it is still in the cache avoids sustaining memory fetch stils and generally CES the memory bus load.
Memory latency
The times it takes to initiate a memory fetch is referred to as memory latency. During this time, the CPU is stalled. The latency penalty is on the order of 100 clock cycles.
Caches were authorized Ted to hide suc
When FFMPEG was recently used for h264 encoding, it was found that the video encoding was delayed, rather than real-time Encoding. After some research, we found thatAvcodec_open2Function
When encoder is enabled, SetAvdictionaryThe key code is as follows:
Avcodec_open2 function:
int avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options);
Solution:
Avdictionary * Param = NULL; // h264, set to encode latency to encode imm
First,description of problem phenomenaAfter successful installation of a Dell Server Rhel 6.8 System, the user reflects a high latency when logging in to the server via SSH, and can delay up to 6-7s or even direct error.Connecting to 10.0.0.10:22 ...Connection established.To escape to local shell, press ' ctrl+alt+] '.Information to display when connectingLast Login:thu Jul 7 16:24:56 from 10.0.0.10Wait a long time before showing successful connection
Pt-heartbeat
Database master from replication, replication status, data latency is a very important indicator of the normal, then how to monitor it?
Pt-heartbeat is a tool set developed by Percona to monitor the replication latency of MySQL and PostgreSQL.
More mature, such as Uber and other large companies are in use.
Monitoring principle
Build a heartbeat table in master, which has a timestamp field
This article mainly introduces how JavaScript achieves the sliding menu effect with the latency function. It involves the page style delay Conversion Function Based on mouse events and time functions. It has some reference value, for more information about how JS achieves the sliding menu with the latency function, see the examples in this article. Share it with you for your reference. The details are as fo
Configuration referenceHttps://github.com/simple-rtmp-server/srs/wiki/v2_CN_LowLatencyLatency Impact factorsEncoders: Different encoders (free or open source), the delay is also different.Streaming Media server: SRS2Streaming protocol: For example: RTMP is real-time high, http_flv is also high-real-time, HLS is not, the official said 60s can tolerate ...Player: VLC is slower than Ffplayer and player.Network: Of course, it is also related to the network, and the relationship is relatively large.V
day in 365 days a year? After thinking for a while, he expressed with Extreme suspicion that it was impossible and felt like a day, and he was eager to remember his ability to remember each day. He is eager to remember that every day is a enrichment, reflection, and accumulation. When I asked him to write logs to record his own day, he hesitated and unknowingly explained some objective obstacles. When asked him the root cause, he said he was not patient. I clearly know that things are "correct"
This article mainly introduces jquery's method of implementing the TAB tab mouse with a latency effect, which can achieve the delayed loading effect of the TAB, involving jquery mouse events and related usage techniques of the latency function, for more information, see the example in this article. Share it with you for your reference. The details are as follows:
If you want to execute some functions after
Comparison and summarization of several delayed execution methods in iOS, ios latency
This article lists four methods for delaying the execution of a function and their differences. If the latency is 1 second, execute the following method.
- (void)delayMethod{ NSLog(@"execute");}
1. performSelector Method
[self performSelector:@selector(delayMethod) withObject:nil afterDelay:1.0f];
This method must be
The design prototype of many standard query operators returns an ienumerable CodeWhen the row is executed, a sequence is returned. In fact, an object is returned. when the object is enumerated (such as foreach), an element is generated from the ienumerable A small example proves the existence of "delayed query"
Int [] intarray = new int [] {0, 1, 2, 3}; ienumerable
The two output results are: 0, 1, 2, 3, 4, 1, 2, 3. it can be seen that the query operation will be performed only when items i
When there are a large number of images on the page, the download may cause page latency. The following describes a solution to this problem:
Function
Regimg
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E
,
SRC
){
If
(
!
Window
.
Imghash
)
Window
.
Imghash
=
New
Object
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VaR
A
=
Imghash
[
SRC
]
;
E
.
Onerror
=
Null
;
If
(
A
=
Null
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{
E
.
Style
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=
"
None
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File_get_contents high latency usage, file_get_contents. File_get_contents high-latency usage. file_get_contents first solves the super-time problem of file_get_contents. after the super-time response, it performs a failover like settimeout in js, when the quota exceeds the file_get_contents high quota usage, file_get_contents
First, solve the super-time problem of file_get_contents. after the super-time i
This article mainly introduces a case of troubleshooting slave database latency in MySQL, aiming at the high CPU usage in the slave database without service status, for more information about how to send a ticket to a customer today, if the slave database has no business, one core of the mysqld cpu occupies 100%. query the slow query of the master database and there are no SQL statements about writing.
It can be said that the typical single-process re
This article mainly introduces file_get_contents high-latency usage in PHP, including timeout restrictions and POST implementation usage. For more information, see the following example to describe file_get_contents advanced usage in PHP, share it with you for your reference. The specific analysis is as follows:
First, solve the problem of file_get_contents timeout. After a timeout error is returned, an attempt is made like settimeout in js. after th
US-level latency function in WinCE
Author: Lai yuping (auly) aulyp@163.com
in wince 5.0 1us latency, system API .
The following is a verified function that is very useful for communication protocols.
Void delay_us (int n)
{
Large_integer litmp;
Longlong qpart1, qpart2;
Double dfminus, dffreq, dftim;
Queryperformancefrequency ( litmp );
Dffreq = (double) litmp.
This goes back to the beginning of 2007. Apple, on the eve of the launch of its first iPhone, encountered a problem-the site was designed for large-screen devices. So Apple's engineers made some promises to tackle the problem of the IPhone's small screen browsing desktop-side site. The most famous of these is the double-click Zoom (double tap to zoom). This is also the main reason for the 300 millisecond delay mentioned above.When the user taps the screen one time, the browser does not immediate
Codeforces Round #312 (Div. 2) E. A Simple Task line segment tree latency tag
E. A Simple TaskTime limit per test5 secondsMemory limit per test512 megabytesInputstandard inputOutputstandard outputThis task is very simple. given a string S of length n and q queries each query is on the format I j k which means sort the substring consisting of the characters from I to j in non-decreasing order if k limit = Limit 1 or in non-increasing order if k Limit =
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