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libevent对比libev的基准测试 - C/C++ - 清泛网 - 专注C/C++及内核技术
...置或更改事件观察器的成本显然比 libev 高得多,API 差异无法解释这一点(libev 中的原生 API 和仿真 API 之间的差异非常小)。这在实践中很重要,因为 libevent API 没有很好的接口来动态更改事件观察者或超时。
在文件描述符数...
Apache两种工作模式区别及配置切换 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...限制不能大于256。如果把这个值设为大于256,那么Apache将无法起动。事实上,256对于负载稍重的站点也是不够的。在Apache 1.3中,这是个硬限制。如果要加大这个值,必须在“configure”前手工修改的源代码树下的src/include/httpd.h中...
How to capture stdout output from a Python function call?
...
Here is an async solution using file pipes.
import threading
import sys
import os
class Capturing():
def __init__(self):
self._stdout = None
self._stderr = None
self._r = None
self._w = None
self._thread = None
...
Android代码优化小技巧 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...。这是一个好的习惯,因为你可以从方法声明中得知调用无法改变这个对象的状态。
常量声明为Static Final
先看下面这种声明的方式
static int intVal = 42;
static String strVal = "Hello, world!";
编译器会在类首次被使用到的时候,使用...
In SQL Server, when should you use GO and when should you use semi-colon ;?
...nation string. For example, you might specify that statements end with two pipe characters ||. You could then issue CREATE PROCEDURE ... much SQL ending in ; ... || and the double pipe ends the CREATE PROCEDURE statement. So my question is whether this is analgous to the MS GO statement? Secondly, c...
Confused about stdin, stdout and stderr?
...nnections between these handles and specific files and/or devices (or even pipelines to other processes) before your process starts (some of the manipulations possible are rather clever).
An example being:
my_prog <inputfile 2>errorfile | grep XYZ
which will:
create a process for my_prog...
Apache and Node.js on the Same Server
... with the ProxyPass directive in the Apache httpd.conf its not too hard to pipe all requests on a particular URL to your Node.JS application.
ProxyPass /node http://localhost:8000
Also, make sure the following lines are NOT commented out so you get the right proxy and submodule to reroute http re...
FAT32文件系统格式详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...,容量介于1GB到2GB时,一簇对应32个扇区,超出2GB的部分无法使用。显然,对于容量大于512MB的逻辑盘,采用FAT32的簇比采用FAT16的簇小很多,大大减少了空间的浪费。 但是,对于容量小于512MB的盘,采用FAT32虽然一簇8个扇区...
Http长连接200万尝试及调优 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...0万,好,问题来了。
当我设置nofile为200万时,系统直接无法登陆了。尝试几次,发现最大只能设置到100万。在查过源码后,才知道,原来在2.6.25内核之前有个宏定义,定义了这个值的最大值,为1024*1024,正好是100万,而在2.6.25...
Rename MySQL database [duplicate]
...
Just create the database and pipe the results from one directly to the other: mysqldump -u root -p old_db|mysql -u root -p new_db.
– Pacerier
Oct 12 '15 at 9:55
...
