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Make a program run slowly

...ate less (and possibly shorter) execution time frames, preempt more often, etc. See Process Scheduling (Chapter 10) of Understanding the Linux Kernel for more details on scheduling. You may want to increase the timer interrupt frequency to put more load on the kernel, which will in turn slow everyth...
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如何查看Oracle用户的SQL执行历史记录? - 数据库(内核) - 清泛网 - 专注C/...

...来源:http://www.cnblogs.com/net2012/archive/2013/01/21/2869636.html 问题:如何知道一个session都执行过哪些SQL语句?(查看当前比较容易,历史的呢?怎么复原sql的执行场景——事务关系、执行序列、单SQL还是存储过程) 【方法一】查...
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搭建高可用mongodb集群(四)—— 分片 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

...可用mongodb集群(三)—— 深入副本集》搭建后还有两个问题没有解决:从节点每个上面的数据都是对数据库全量拷贝, 按照上一节中《搭建高可用mongodb集群(三)—— 深入副本集》搭建后还有两个问题没有解决: 从节点...
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How to write LDAP query to test if user is member of a group?

...uery will look something like this: ldapsearch -x -D "ldap_user" -w "user_passwd" -b "cn=jdoe,dc=example,dc=local" -h ldap_host '(memberof=cn=officegroup,dc=example,dc=local)' If you want to see ALL the groups he's a member of, just request only the 'memberof' attribute in your search, like this:...
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OpenSSH升级后不能登录的问题 - 更多技术 - 清泛网 - 专注C/C++及内核技术

OpenSSH升级后不能登录的问题升级OPENSSH 遇到头疼的问题Openssh 爆出很多安全漏洞,客户那边搞安全检查,扫描结果出来了,漏洞基本都是在openssh上面于是打算升级升...升级OPENSSH 遇到头疼的问题 Openssh 爆出很多安全漏洞,客...
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Getting command-line password input in Python

... Portable password input #!/usr/bin/python3 from getpass import getpass passwd = getpass("password: ") print(passwd) You can read more here share | improve this answer | f...
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C++STL容器使用经验总结 - C/C++ - 清泛网 - 专注C/C++及内核技术

...更容易,更能清楚地表达你的意图,而且它们表现出了更高的效率。 第6条:当心C++编译器最烦人的分析机制。 把形参加括号是合法的,把整个形参的声明(包括数据类型和形参名字)用括号括起来是非法的。 第7条:...
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Android代码优化小技巧 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...尽量避免创建不必要的对象,有下面一些例子来说明这个问题: 如果你需要返回一个String对象,并且你知道它最终会需要连接到一个StringBuffer,请修改你的实现方式,避免直接进行连接操作,应该采用创建一个临时对象来做...
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MySQL high CPU usage [closed]

...ication is running, if there's duplicate queries, how long they're taking, etc, etc. An example of something like this is one I've been working on called PHP Profiler but there are many out there. If you're using a piece of software like Drupal, Joomla or Wordpress you'll want to ask around within t...
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How can I connect to MySQL in Python 3 on Windows?

...ysql.connect(host='127.0.0.1', unix_socket='/tmp/mysql.sock', user='root', passwd=None, db='mysql') cur = conn.cursor() cur.execute("SELECT Host,User FROM user") for r in cur: print(r) cur.close() conn.close() share ...