Ensure Indexes Fit in RAM — MongoDB Manual https://docs.mongodb.com/manual/tutorial/ensure-indexes-fit-ram/…

1. Introduction 1.1. About 1.2. Sphinx features 1.3. Where to get Sphinx 1.4. License 1.5. Credits 1.6. History 2. Installation 2.1. Supported systems 2.2. Compiling Sphinx from source 2.2.1. Required tools 2.2.2. Compiling on Linux 2.2.3. Known comp…

Retail Reference Architecture Part 1: Building a Flexible, Searchable, Low-Latency Product Catalog Product catalog data management is a complex problem for retailers today. After years of relying on multiple monolithic, vendor-provided systems, retai…

https://docs.bonsai.io/article/123-capacity-planning Capacity Planning Capacity planning is the process of estimating the resources you’ll need over short and medium term timeframes. The result is used to size a cluster and avoid the pitfalls of inad…

MMS关键指标意义&各数值区间意义 What's MMS MongoDB Management Service (MMS) is a suite of services for managing MongoDB deployments. 统计图表的数据来源 all statistics can show in mongo shell by: >db.serverStatus() opcounters 意义:The average number of commands performed pe…

reference:http://java.dzone.com/articles/caching-best-practices There is an irresistible attraction to writing custom caching solutions, since it seems to be the easiest path to “improving” the overall application performance. Well, caching is a grea…

## part 1 mms图 What's MMS MongoDB Management Service (MMS) is a suite of services for managing MongoDB deployments. 统计图表的数据来源 all statistics can show in mongo shell by: >db.serverStatus() opcounters 意义:The average number of commands performed per sec…

Bruce Momjian POSTGRESQL is an object-relational database developed on the Internet by a group of developers spread across the globe. It is an open-source alternative to commercial databases like Oracle and Informix. POSTGRESQL was originally develop…

简述: 本文内容主要 Giuseppe Maxia 曾在Mysql Conference & Expo 2010发表关于 <Mysql Partition in Mysql 5.1 & 5.5>  经由整理后的内容,原文在下面的Presentation URL,本文用于自身学习 .我自身关于分区与未分区的测试,打算发表于另一篇博文.Giuseppe Maxia Bloghttp://datacharmer.blogspot.com/http://datacharmer.com/…

CachesExplained Explanation for how to use Guava caches. explained Updated Jun 4, 2013 by lowas...@google.com Example LoadingCache<Key,Graph> graphs =CacheBuilder.newBuilder()       .maximumSize(1000)       .expireAfterWrite(10,TimeUnit.MINUTES)   …

vmlinuz Definition | vmlinuz的定义 vmlinuz is the name of the Linux kernel executable.vmlinuz是Linux内核可执行文件的名字. A kernel is a program that constitutes the central core of a computer operating system. It is the first thing that is loaded into memory (whic…

Siebel Configuration and Development Guideline 1 2 2.1 2.2 2.3 11. 2.4 2.5 3 3.1 3.2 3.2.1 3.2.2 3.3 3.4 3.4.1 3.4.2 3.4.3 3.5 3.5.1 3.5.2 3.5.3 3.5.4 3.5.5 3.6 3.7 4 5 5.1 5.2 5.3 5.4 6 7 7.1 7.2 7.3 8 1       Objectives The intent of this document…

Creating a Custom Page Layout in SharePoint 2013 In my last article, I documented how to create a Master Page in SharePoint 2013.  Master Pages define the global chrome elements of your web site.  This article explains how to create custom page layou…

1.从Java语言考虑,已经有ConcurrentHashMap等并发集合类了,与Redis相比,区别于差异在哪? 一直有这么个疑问,今天有搜了很久,很巧,搜到个有同样想法的问答,如下: When profiling a java application currently under development at work, we have detected a few bottle necks that we can get rid of using caching. The applica…

目录 文章目录 目录 前文列表 numa_fit_instance_to_host _numa_fit_instance_cell _numa_fit_instance_cell_with_pinning _pack_instance_onto_cores 使用示例 NUMA 对齐,CPU isolate NUMA 对齐 CPU require NUMA 对齐,CPU prefer NUMA 不对齐,CPU isolate NUMA 不对齐 CPU require NUMA 不对齐,CPU pr…

This is the last in a series of Postgres posts that Pat Shaughnessy wrote based on his presentation at the Barcelona Ruby Conference. You can also watch the video recording of the presentation. The series was originally published on his personal blog…

最近机房挪机柜,网线拔拔插插,又在虚拟机上配置了网卡的各项设置,其中一个虚拟机的网站这两天经常无法访问, 于是关注了一下虚拟机的“事件”,发现另外一个跳转网站的警告: 于是去vmware的官网上找到了一下内容: http://kb.vmware.com/selfservice/microsites/search.do?cmd=displayKC&externalId=1014593 Resolution This warning is reported when the virtual mach…

sklearn实战-乳腺癌细胞数据挖掘(博客主亲自录制视频教程) https://study.163.com/course/introduction.htm?courseId=1005269003&utm_campaign=commission&utm_source=cp-400000000398149&utm_medium=share     # -*- coding: utf-8 -*- ''' python入门/爬虫/人工智能/机器学习/自然语言/数据统计分析视频教程网址 h…

This article is from an interview with Zuhaib Siddique, a production engineer at HipChat, makers of group chat and IM for teams. HipChat started in an unusual space, one you might not think would have much promise, enterprise group messaging, but as…

BACKGROUND A graphics processing unit (GPU) is a specialized electronic device that is specifically designed to perform operations related to graphics processing. GPUs are often built with a highly parallel structure that provides more efficient proc…

转载.节选于 https://dev.mysql.com/doc/refman/8.0/en/innodb-indexes.html This section covers topics related to InnoDB indexes. 1.Clustered and Secondary Indexes Every InnoDB table has a special index called the clustered index where the data for the rows i…

出现如下错误: /arm-none-eabi/bin/ld: build/com.zubax.gnss.elf section `.text' will not fit in region `flash' /arm-none-eabi/bin/ld: region `flash' overflowed by 5869 bytes bootloader编译,.text已经超过预设大小.修改方案有两个: 精简代码 修改MEMORY预设值 ChibiOS 以ChibiOS为例,修改ld.ld文件和Ma…

前言 是的,除了水报错文,我也来写点其他的.本文主要介绍Keras中以下三个函数的用法: fit()fit_generator()train_on_batch()当然,与上述三个函数相似的evaluate.predict.test_on_batch.predict_on_batch.evaluate_generator和predict_generator等就不详细说了,举一反三嘛. 环境 本文的代码是在以下环境下进行测试的: Windows 10Python 3.6TensorFlow 2.0…

把myeclipse10 按照目录完整拷贝到了另外一台电脑, 另外的目录 原安装目录 D\:\soft\i\myeclipse10 新安装目录 E\:\soft\myeclipse10 双击启动失败, 查看日志 could not find .. javax.transaction_1.1.1.v201105210645.jar ... java.lang.IllegalStateException: Unable to acquire application service. Ensure t…

Linux内核suspend状态 Linux内核支持多种类型的睡眠状态,通过设置不同的模块进入低功耗模式来达到省电功能.目前存在四种模式:suspend to idle.power-on standby(Standby).suspend to ram(STR)和sudpend to disk(Hibernate),分别对应ACPI状态的S0.S1.S3和S4. Suspend to idle完全是软件相关的并且尽量将CPU维持在深度idle状态. Power-on standby设置设备进入低功…

一.背景 前段时间服务器出了点问题,加上学业愈来愈紧张,写博文分享的时间越来越少.虽然不是第一次在博客园上写经验,但是近期分享的博文得到了不少的朋友支持和指正,在这里内心非常感激和开心.希望以后能认真用好时间,把一些有用的经验分享给需要的人,当然本科阶段的我还有许多不懂的,如果在文章中有错误,希望大家多多指正,必虚心受教. 今天要分享的是使用c#获取服务器CPU.RAM.TCP.磁盘使用情况.前段时间,做了一个几十人的并发测试,服务器宕机了,后来上控制管理台检查测试时间段里服务器各项数据,可惜没…

catalogue . ROM.RAM.DRAM.SRAM和FLASH的区别 . 内存工作原理 . DRAM基本结构与原理 . SD卡基本结构与原理 1. ROM.RAM.DRAM.SRAM和FLASH的区别 0x1: ROM ROM和RAM指的都是半导体存储器,ROM是Read Only Memory的缩写,ROM也有很多种 . PROM是可编程的ROM: PROM是一次性的,也就是软件灌入后,就无法修改了,这种是早期的产品,现在已经不可能使用了 . EPROM(可擦除可编程ROM): EPR…

RAM和ROM总结 一.在解释之前先备注一些缩写的全称便于记忆: 1.EPROM:(Electrically Programmable Read-Only-Memory)电可编程序只读存储器 2.EEPROM(Electrically Erasable Programmable Read - Only Memory) 电可擦可编程只读存储器 3.SRAM(Static RAM)静态RAM 4.DRAM(Dynamic RAM)动态RAM 5.DDR SDRAM (Double Date-Rate…

转自:http://www.wowotech.net/u-boot/fit_image_overview.html 1. 前言 Linux kernel在ARM架构中引入设备树device tree(全称是flattened device tree,后续将会以FDT代称)的时候[1],其实怀揣了一个Unify Kernel的梦想----同一个Image,可以支持多个不同的平台.随着新的ARM64架构将FDT列为必选项,并将和体系结构有关的代码剥离之后,这个梦想已经接近实现: 在编译linux k…

或许有些氨基小白不知道RAM是什么,官方的解释是"运行内存" 只要你的RAM够大,你玩什么都不卡! 今天给大家带来的就是 <RAM清理器>!!体积小,能量大就是我给他介绍!适用4.02以上安卓系统,1G以下的渣机效果明显!!(可怜的楼楼也是用的渣机,RAM连500MB都没有 呜呜呜-) 不多说 我不会生产软件APP,只是软件APP的搬运工!觉得好用的,关注楼楼哦!链接: http://yo9.com/Uj67n2…