Eclipse崩溃,错误提示:MyEclipse has detected that less than 5% of the 64MB of Perm Gen (Non-heap memory) space remains. It is strongly recommendedthat you exit and restart MyEclipse with new virtual machine memoryparamters to increase this memory. Failure…
MySQL 各种超时参数的含义 今日在查看锁超时的设置时,看到show variables like '%timeout%';语句输出结果中的十几种超时参数时突然想整理一下,不知道大家有没有想过,这么多的timeout参数,到底有什么区别,都是做什么用的呢? MySQL [(none)]> show variables like '%timeout%'; +------------------------------+----------+ | Variable_name | Value | +…
To understand the backlog argument, we must realize that for a given listening socket, the kernel maintains two queues :要明白backlog参数的含义,我们必须明白对于一个listening socket,kernel维护者两个队列: 1.An incomplete connection queue, which contains an entry for each SYN t…
转自: 彻底搞明白find命令的-mtime参数的含义-goolen-ITPUB博客http://blog.itpub.net/23249684/viewspace-1156932/ 以前一直没有弄明白find的 -mtime参数的真正含义刚好今天跟一个同学聊起这个事我在写shell脚本的时候,定时删除一些文件的时候,也经常用得到-mtime这个参数,所以打算好好看看,把它弄明白一下 man find里的解释:-mtime nFile’s data was last modified n*24…