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Ora-00257 错误处理一列 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...$ echo $ORACLE_SID
空的
查看环境变量
vi .bash_profile 没有问题
查看权限
ll .bash_profile
-rw--rw--- 1 oracle oinstall 529 10鏈?24 20:18 /home/oracle/.bash_profile
有问题。修改权限
chmod 775 /home/oracle/.bash_profile
进入ORLACE
sqlplus /as sysd...
关于Rsyslogd 的一些配置 (高性能、高可用 rsyslogd) - C/C++ - 清泛网 - ...
...在系统、环境正常的时候能够运行。一旦出现异常，各种问题就全出来了。
推荐的文档和我认为比较关键的配置请见下图：
几点说明：
推荐仔细阅读 第一篇 关于 rsyslog queue的文档，细节几乎都在这篇文档里。
定义 $Ma...
PHP “php://input” vs $_POST
...
The reason is that php://input returns all the raw data after the HTTP-headers of the request, regardless of the content type.
The PHP superglobal $_POST, only is supposed to wrap data that is either
application/x-www-form-urlencoded (standard content type for...
初窥InnoDB的Memcached插件 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...务器不仅浪费了内存，而且还必须自己维护数据的不一致问题，有了Memcached插件，这些问题都不存在了，而且借助MySQL本身的复制功能，我们可以说是变相的实现了Memcached的复制，这更是意外之喜。
安装
为了让文章更具完整性...
AfxGetApp->GetMainWnd() 与 AfxGetMainWnd() - C/C++ - 清泛网 - 专注C/C++及内核技术
...Wnd()取得的是主窗口句柄,无论在那个线程里调用都是没有问题的,因为它先取得主线程句柄,再取得主线程的活动窗口(如视图切换可能导致的替代，这种情况我也不大清楚），如果没有活动窗口则取主窗口,任何程序总要有一个主...
“Notice: Undefined variable”, “Notice: Undefined index”, and “Notice: Undefined offset” using PHP
... can be used to detect if a variable has been already initialized. Additionally and more ideal is the solution of empty() since it does not generate a warning or error message if the variable is not initialized.
From PHP documentation:
No warning is generated if the variable does not exist. T...
关于我们 · App Inventor 2 中文网，少儿编程陪伴者
...一名学生，升级VIP会员后，可以随时随地在线编程，遇到问题提问都能及时得到详细解答，我的App开发技能得到了极大的提升！另外，我享受到VIP学生价格优惠，非常划算！ ...
How do I read any request header in PHP
...
IF: you only need a single header, instead of all headers, the quickest method is:
<?php
// Replace XXXXXX_XXXX with the name of the header you need in UPPERCASE (and with '-' replaced by '_')
$headerStringValue = $_SERVER['HTTP_XXXXXX_XXXX'];
ELSE IF: you run PHP...
Why is require_once so bad to use?
...system keeps a log of what's already been included/required. Every *_once call means checking that log. So there's definitely some extra work being done there but enough to detriment the speed of the whole app?
... I really doubt it... Not unless you're on really old hardware or doing it a lot.
I...
How to include PHP files that require an absolute path?
... just a question, why realpath() for $_SERVER["DOCUMENT_ROOT"]? This shall not output always the canonical path?
– João Pimentel Ferreira
Nov 15 '15 at 0:30
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