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  MySQL:COUNT (*) profile optimizing phase is slow

  Briefly record it for later analysis. 1. A friend @ asked me why I was slow to mysql > show profiles; + in the optimizing phase.

  Stages functions actual data friends physics parts problems three authors at the same time actually engines interfaces files permissions source code semantics statements syntax 2022-06-01
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  Detailed installation tutorial for storm

  This article introduces the "detailed installation tutorial of storm" related knowledge, in the actual case operation process, many people will encounter such a dilemma, and then let the editor lead you to learn how to deal with these situations! I hope you can read it carefully and be able to achieve something! This article demonstrates the installation order

  Directories variables runs programs stand-alone files versions environments examples tutorials content words instances more servers times knowledge systems firewalls services 2022-06-02
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  Introduction of oracle sqlloader into Times ORA-01830 solution process

  Goal: import / home/oracle/xfsqlldr.csv into the newly created CHOICE.T_LOAN_ANNUAL_ customer no table. New table: create table CHOICE.T_LOAN_ANNU

  Head office consistency file control check again most data text log time title format goal empowerment processing output times process 2022-06-01
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  How to use Python to implement Hadoop MapReduce Program

  How to use Python to achieve Hadoop MapReduce programs, I believe that many inexperienced people do not know what to do, so this paper summarizes the causes of the problem and solutions, through this article I hope you can solve this problem. The running effect of the author's machine is as follows (number of inputs

  Results output programs words data directories code files scripts clusters runs examples times tests inputs standards storage help tasks content 2022-06-01
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  How to integrate sparksql and hive

  This article mainly introduces how to integrate sparksql and hive. It is very detailed and has a certain reference value. Friends who are interested must finish it! Hive configuration Editor $HIVE_HOME/conf/hive-site.xml, add

  Model content integration article configuration representative value interest guy partner more knowledge results industry information information channel channel reference help support 2022-05-31
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  Getting started with 4.spark

  The    spark framework is written in scala and runs on the Java virtual machine (JVM). Support Python, Java, Scala or R multiple languages to write client applications. Download Spark    and visit http://spark.apache.

  Run word application interactive statistics script command method analysis independence number content foundation multiple technology zipper file tag case directory 2022-06-03
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  Example Analysis of Linux Command Line and shell script programming

  Editor to share with you the Linux command line and shell script programming example analysis, I believe that most people do not know much about it, so share this article for your reference, I hope you will learn a lot after reading this article, let's go to know it! The first footnote

  Files commands code runs symbols scripts functions parameters articles jobs loops output examples scripting analysis programming signals signal processing content background 2022-06-03
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  Shell monitoring host

  1. Check the host network card traffic #! / bin/bash#networkwhile:; dotime='date +% m "-"% d ""% k ":"% M'day='date +% m "-"% dwindrxroombefore=

  Host monitoring memory hours space information omni-directional performance situation data log time time period traffic status directory disk system statistics network card 2022-06-01
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  PHP, MYSQLI implementation pagination (beginners)

  / / the idea of implementing the paging function for the first time (of course, it's someone else's idea, I just wrote it down) / / 1. Calculate the total number of entries if 13 / / prepare sql statements (query the total number of data in the database bbs_ user table) $sql =

  Number of pages previous that is home page statement this is find out initial value home page query limit formula address name password age sex idea data condition 2022-06-01
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  How to use the du command in linux

  In this issue, the editor will bring you about how to use the du command in linux. The article is rich in content and analyzes and narrates it from a professional point of view. I hope you can get something after reading this article. Du-sh * View the folder size in the current directory using the du command

  File directory disk situation command flag link unit byte report input size parameter subdirectory subdirectory hierarchy symbol structure that is subtree 2022-06-01
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  Vertica database copy command is to achieve data loading code how to write

  Vertica database copy command is to achieve data loading code how to write, many novices are not very clear about this, in order to help you solve this problem, the following editor will explain in detail for you, people with this need can come to learn, I hope you can get something. Vertica number

  Data success reason parameters text log help code command database clear content again actual customer client this article novice time 2022-06-01
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  Example Analysis of quota in CentOS

  This article mainly shows you the "sample analysis of quota in CentOS", which is easy to understand and clear. I hope it can help you solve your doubts. Let the editor lead you to study and study the "sample analysis of quota in CentOS".

  Limits user configuration space size check file directory project control content system validation time example analysis information name server 2022-06-01
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  How to use listeners in SpringBoot

  Today, the editor will share with you the relevant knowledge points about how to use the listener in SpringBoot. The content is detailed and the logic is clear. I believe most people still know too much about this knowledge, so share this article for your reference. I hope you can get something after reading this article.

  Monitor data user listener information object up and down context database method cache home page online knowledge article number majority quantity update test 2022-06-01
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  What are the commonly used Linux operating system monitoring scripts

  Editor to share with you what the commonly used Linux operating system monitoring scripts are, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it! 1. View the traffic of the host network card

  Monitoring system host article operating system commonly used script memory content hour space not much omni-directional most situation data more traffic status directory 2022-06-01
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  What are the Linux monitoring scripts

  Editor to share with you what Linux monitoring scripts are, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it! 1. View the traffic code of the host network card as follows: #!

  Monitoring code host article script memory content hour space not much information omni-directional most performance situation data log time time period more 2022-06-03
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  What are the commonly used Linux monitoring scripts

  Editor to share with you what the commonly used Linux monitoring scripts are, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it! 1. View the traffic of host network card #! / b

  Monitoring host article commonly used script memory content hour space not much information omni-directional most performance situation data log time time period more 2022-06-01
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  Preliminary test of pg_repack bloat processing

  First, software installation 1. Software requirements: postgresql-9.5.2.tar.gzpg_repack-1.3.4.zip2. Install pg_ repack [root @ localhost pg_repack-1.3.4]

  Index processing data cursor situation quantity environment parameters multiple preparation test suggestion disk free space transaction check transaction at the same time background 2022-06-01
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  Use sysbench stress test MySQL (3) (R12 notes day 6)

  When I used gdb to debug the transaction critical state in MySQL yesterday, I found that some scenarios might be a little more complicated than I thought, so I scanned it at the end of yesterday's test, but I just made it clear. At this point, I will also take the critical transaction state of Oracle later.

  Test or error adjustment scenario parameters performance time times statements face transaction situation meaning data method time state environment script 2022-06-01
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  What is the commonly used Linux operating system monitoring script code?

  This article is about what the commonly used Linux operating system monitoring script code has. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look. 1. View the traffic code of the host network card as follows: #! / bin/bash # n

  Code monitoring host system operating system commonly used scripts memory content hours more space article good practical information omni-directional performance situation data 2022-06-03
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  Migration of production system from 32BITORACLE10G to 64BIT

  In order to improve SGA and PGA, I will adjust the parameters, and in order to minimize misoperation and successfully complete the data migration, I will give the specific parameter values, commands and directories to be created in each step. It is explained here that for the new server, after analysis, I am going to allocate for SGA

  Data command file database directory log service server authentication backup target parameter user control location location step new object copy 2022-06-02