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摘要: From http://blog.csdn.net/wujiandao/article/details/6621073 1. Four ways to get execution plan(anytime you want, for specified sql) • Execute the SQL 阅读全文
posted @ 2016-12-26 15:50 tang88seng 阅读(571) 评论(0) 推荐(0) 编辑
摘要: Refer to http://www.tldp.org/HOWTO/SSL-Certificates-HOWTO/x64.html The content 1.2. What is SSL and what are Certificates? The Secure Socket Layer pro 阅读全文
posted @ 2016-12-22 16:15 tang88seng 阅读(173) 评论(0) 推荐(0) 编辑
摘要: Some key concents regarding SQL optimization predicate selectivity (column unique ratio) / cardinality (estimated returned) driving (outer) table acce 阅读全文
posted @ 2016-12-21 15:06 tang88seng 阅读(136) 评论(0) 推荐(0) 编辑
摘要: Articles Forward from Locking in Microsoft SQL Server (Part 12 – Lock Escalation) Today I’d like us to talk about Lock Escalation in Microsoft SQL Ser 阅读全文
posted @ 2016-11-30 10:59 tang88seng 阅读(862) 评论(0) 推荐(0) 编辑
摘要: 关于 Solr Cloud Zookeeper 入门,介绍 原理 参考 https://blog.csdn.net/qq_17045385/article/details/74738893 原封不动转自 http://wiki.apache.org/solr/SolrCloud/ ,文章的内存有些过 阅读全文
posted @ 2016-06-30 09:21 tang88seng 阅读(373) 评论(0) 推荐(0) 编辑
摘要: 没有废话,步骤如下: 下载安装软件,MySQL Apache PHP sudo aptitude install mysql-server mysql-client ##安装 MySQLsudo aptitude install apache2 apache2-doc libapache2-mod- 阅读全文
posted @ 2016-05-04 14:02 tang88seng 阅读(1309) 评论(0) 推荐(0) 编辑
摘要: vmstat 的 pi/po si/so --监控一天 vmstat 5 17280> vmstat.txt sar -W 1.得到数据 (linux 的 /var/log/sar/saX 自带) sar -A -o sar.dat 5 17280 2. 分析 sar -W -f sar.dat > 阅读全文
posted @ 2016-04-10 22:10 tang88seng 阅读(474) 评论(0) 推荐(0) 编辑
摘要: 对于某些大型应用来说,SWAP 严重影响性能,尽可能避免使用: The Linux kernel provides a tweakable setting that controls how often the swap file is used, called swappiness A swapp 阅读全文
posted @ 2016-04-10 20:57 tang88seng 阅读(1176) 评论(0) 推荐(0) 编辑
摘要: 直接引用 http://www.cnblogs.com/xdp-gacl/p/3777987.html 阅读全文
posted @ 2016-04-08 21:50 tang88seng 阅读(190) 评论(0) 推荐(0) 编辑
摘要: http://stackoverflow.com/questions/7359702/how-do-i-obtain-a-query-execution-plan 阅读全文
posted @ 2016-04-06 10:15 tang88seng 阅读(127) 评论(0) 推荐(0) 编辑
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