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QEMU KVM Libvirt手册(8): 半虚拟化设备virtio
KVM本身并不提供半虚拟化功能,是通过virtio来实现的 The benefits of virtio drivers are of lower overhead and higher performance. Memory Ballooning (virtio_balloon) memory b...
分类:其他好文   时间:2014-07-13 22:08:16    阅读次数:571
6.824 Lab 5: Caching Extents
IntroductionIn this lab you will modify YFS to cache extents, reducing the load on the extent server and improving YFS performance. The main challenge...
分类:其他好文   时间:2014-07-13 12:04:34    阅读次数:279
Linux virtualization and PCI passthrough
Processors have evolved to improve performance for virtualized environments, but what about I/O aspects? Discover one such I/O performance enhancement...
分类:系统相关   时间:2014-07-13 09:41:59    阅读次数:386
Matlab Plot 使用多个图例( legend )
用matlab 画图时,发现线太多,生成的图例,遮盖了曲线。于是想画成多个图例,然后可以自由拖动。      废话不多说,1)代码; 2)效果。 %%%%%%%%%%%% Code: figure %% ---- plot for maxtries performance set(0,'DefaultTextFontName','Times',... 'DefaultTex...
分类:其他好文   时间:2014-07-12 21:03:59    阅读次数:2602
How to do code coverage test for windows service
First, instrument the exe or dll by commandvsinstr -coverage the dll/exesecond, start the performance monitorVSPerfCmd.exe /start:coverage /output:"D:...
分类:Windows程序   时间:2014-07-11 22:29:17    阅读次数:437
oracle spm使用1
oracle11g new feature SPM 有助于保持sql的语句特性,只允许执行性能提高的执行计划。 它不同于stored outlines, spm在于稳定sql性能,而store outlines在于冻结sql执行计划 事列 1.启用optimizer_cature_sql_plan_baselines 捕获sql语句 SQL> alter sess...
分类:数据库   时间:2014-07-10 23:36:46    阅读次数:364
Performance Tuning MySQL
通常来说,MySQL性能调优是非常复杂的一件事,不是简单的修改参数就可以完成的。需要综合考虑。而且找出性能瓶颈也非易事。但是通常我们有以下的几种方法找到蛛丝马迹。通过下面的几种方法发现瓶颈以后,我们才能确定下一步应该怎么做^_^其他的可以参考我前面写的文章:MySQL常用SQL优化,Linux上跑M...
分类:数据库   时间:2014-07-10 16:10:17    阅读次数:258
introduction
Good morning, my name is Li Huan. It’s really a great honor to have this opportunity for a interview. I hope I can make a good performance today. Now ...
分类:其他好文   时间:2014-07-07 12:11:36    阅读次数:194
Simple Automated Backups for MongoDB Replica Sets
There are a bunch of different methods you can use to back up your MongoDB data, but if you want to avoid downtime and/or potential performance degradation, the most common advice seems to be that y...
分类:数据库   时间:2014-07-06 09:26:04    阅读次数:437
自定向下分析Binder 之 Binder Model(1)
Java层的Binder对象模型: IBinder IBinder是Binder通信机制中的核心部分(Base interface for a remotable object, the core part of a lightweight remote procedure call mechanism designed for high performance when pe...
分类:其他好文   时间:2014-07-03 16:46:20    阅读次数:204
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