不要忘記5
回歸? 我知道!!!
回歸了一個什麼地方?
回歸了我們在什麼地方生活?
我們快樂嘛?
兩粒糖就可以讓我們沉默嘛?
我不知道
我知道...
***********************************
我知道==黑鳥 ( i know
What the unified buffer cache is unifying
Pretty much all Unixes these days have what is called a unified buffercache. If you don't know something about Unix history, this name is alittle puzzling, because what is it unifying?
The simple explanation is that originally Unix had the buffer cache,which cached blocks of recent disk IO (whether directly from userprocesses via read() and write() , or from internal kernel IO), andprocess virtual memory, used for the code and data of running processes.The buffer cache was statically
從密雲到太空漫遊
自家雜碎
每年七一都裙拉褲甩。今年在鵝頸橋街市尼泊爾人的布店裡買了兩幅紗布，上到廿九几，已經兩點。紗布漂亮但疏漏，兩點半兩點半了，口號還未想到，一眾廿九几藝術家冷The optimization rule for systems
One of the rules of optimizing program performance is that there isno point in optimizing code that is not run very often; you optimizethe performance critical code, and then move on to other work. Thereis a similar principle in system design and system administration: improving an area that is not a concern to people does not reallyexcite them . To significantly improve people's lives, you have to workon something that they care about, something that is hurting them now.
An important consequence of people not caring
雨中尋雨，縫裡的縫
Weekly spam summary on June 30th, 2007
This week, we:
- got 10,108 messages from 265 different IP addresses.
- handled 22,107 sessions from 2,055 different IP addresses.
- received 271,991 connections from at least 75,816 different IPaddresses.
- hit a highwater of 13 connections being checked at once.
Volume is definitely up from last week .As the per day table illustrates, spammers seem to still preferWednesday for their big day:
| Day |