The important thing in life is not how long you will live, but whom you are living with.
发布时间：2014-12-06 21:39:48
jstat看gc的情况，报错说是 pid not found sun bug库 http://bugs.sun.com/view_bug.do?bug_id=6447182 redhat bug库 https://bugzilla.redhat.com/show_bug.cgi?id=527425 原来如果你需要开启jvm PerfData的话他会生成一个 /tmp/hsp.........【阅读全文】
发布时间：2014-11-18 12:17:39
表格 B-1. 特殊的shell变量变量含义$0脚本名字$1位置参数 #1$2 - $9位置参数 #2 - #9${10}位.........【阅读全文】
发布时间：2014-11-07 12:20:33
[+] Mysql到底是怎么实现MVCC的？这个问题无数人都在问，但google中并无答案，本文尝试从Mysql源码中寻找答案。 在Mysql中MVCC是在Innodb存储引擎中得到支持的，Innodb为每行记录都实现了三个隐藏字段：6字节的事务ID（DB_TRX_ID ）7字节的回滚指针（DB_ROLL_PTR）隐藏的ID.........【阅读全文】
发布时间：2014-11-07 09:54:34
Consistent Nonlocking ReadsA consistent read means that InnoDB uses multi-versioning to present to a query a snapshot of the database at a point in time. The query sees the changes made by transactions that committed before that point of time, and no changes made by later or.........【阅读全文】
