大约有 1,100 项符合查询结果（耗时：0.0170秒） [XML]
内存优化总结:ptmalloc、tcmalloc和jemalloc - 操作系统(内核) - 清泛网 - ...
...。目前已经在chrome、safari等知名软件中运用。
根据官方测试报告，ptmalloc在一台2.8GHz的P4机器上（对于小对象）执行一次malloc及free大约需要300纳秒。而TCMalloc的版本同样的操作大约只需要50纳秒。
小对象分配
tcmalloc为每个线...
Multiple commands on a single line in a Windows batch file
... by turning on delayed expansion:
pax> cmd /v:on /c "echo !time! & ping 127.0.0.1 >nul: & echo !time!"
15:23:36.77
15:23:39.85
That's needed from the command line. If you're doing this inside a script, you can just use setlocal:
@setlocal enableextensions enabledelayedexpansion
@ec...
Reconnection of Client when server reboots in WebSocket
... @Peter, not sure if ws state is open you need to (or should) ping, if I'm correct it's already in websocket protocol. This overkill just had load on your server...
– comte
Apr 5 '18 at 22:07
...
Oracle TNS names not showing when adding new connection to SQL Developer
...ys find out the location of the tnsnames.ora file being used by running TNSPING to check connectivity (9i or later):
C:\>tnsping dev
TNS Ping Utility for 32-bit Windows: Version 10.2.0.1.0 - Production on 08-JAN-2009 12:48:38
Copyright (c) 1997, 2005, Oracle. All rights reserved.
Used parame...
开源跳板机(堡垒机)Jumpserver v2.0.0 使用说明 - 开源 & Github - 清泛网 ...
...人问为何不是添加用户组？ 因为四个字比较好看)
1.5 测试添加的用户
根据邮件说明，登录web
下载ssh密钥，用来登录jumpserver
导入到工具或者使用ssh命令登录jumpserver，本例使用xshell导入
登录jumpserver
二. 资产...
Validating IPv4 addresses with regexp
...09.09.09.09 considered a valid IP? It also gets matched by this regex. But ping throws error message like ping: cannot resolve 09.09.09.09: Unknown host. I think it might be wise to reduce the matching to dot-decimal notation matching only. This entry discusses on leading errors in IP addresses.
...
Connecting to TCP Socket from browser using javascript
...://IPAddress:Port');
connection.onopen = function () {
connection.send('Ping'); // Send the message 'Ping' to the server
};
http://www.html5rocks.com/en/tutorials/websockets/basics/
Your server must also be listening with a WebSocket server such as pywebsocket, alternatively you can write your...
Vsphere 6 集群上 安装 oracle rac 遇到的共享磁盘故障 - 数据库(内核) - ...
...机，重新进入的shell 模式添加参数。，并刷新生效。为了测试各参数的效果，分别添加
disk.locking=”fales”
任然只有一台虚拟机可以启动
分别测试SCSI磁盘总线为准虚拟&LSI LOGIC&LSI,SAS,并且SCSI共享总线设置为无的情况下该...
ERROR 2006 (HY000): MySQL server has gone away
... file, you can check this answer. Also do not forget to restart mysql by typing: sudo service mysql restartfor the changes to the my.cnf file to take effect.
– consuela
May 14 '15 at 16:01
...
fstream默认不支持中文路径和输出整数带逗号的解决办法 - C/C++ - 清泛网 -...
...>
#include <direct.h>
using namespace std;
void main()
{
_mkdir("测试"); //新建一个中文文件夹
ofstream outfile( "测试/test.txt", ios::out ); //创建文件
if( !outfile )
{
cout << "Failed to create file!";
return ;
}
outfile.close();
}
程序...