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小型机迁移x86平台之老生常谈

Posted by admin on July 17th, 2014

You can view this presentation click here: x86_architect
注意使用chrome打开文件 不然可能乱码

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Posted in migration, oracle, system, unix | No Comments »

linux tools part 9– Monitoring system performance

Posted by admin on April 25th, 2014

淘宝的开源监控工具 –同事推荐安装测下来非常不错 可以配合zabbix进行数据的采集

link:http://tsar.taobao.org/

[mysql@mysqldb tmp]$ tsar 
 
Time           ---cpu-- ---mem-- ---tc[......]

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IBM will support Flash In DIMM using MCS

Posted by admin on January 17th, 2014

The next generation of IBM’s X-series servers will be able to accommodate solid-state Flash drives clipped into their DIMM memory slots, potentially i[……]

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Posted in Architect, hardware, system, unix | No Comments »

团队合照一张

Posted by admin on December 25th, 2013

团队圣诞合照一张,缺了一个同事,也走了几个同事,往事不堪回首 – -)

IMG_0975

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闲聊,闲扯

Posted by admin on October 30th, 2013

letsdiscusspng

一个月没写blog了,不想在10月打破连续每月blog的传统,那就说一说1号店今年的IT发展吧,纯属闲扯。

首先rdbms数据库方面,继续坚持之前制定的方针,大量的oracle转向的mysql(mysql在oracle接手之后,稳定性确实得到了极大的提高,innodb的并发能力提升[……]

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How to use Flash Cache on Redhat (not OEL)

Posted by admin on August 26th, 2013

QQ图片20130826223025

By ask Surachart for help

Test: Flash Cache on 11gR2 + RHEL

A Flash Cache (11gR2) is supported by OEL or Solaris. If Want To use RHEL(Ex[……]

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linux tools part 8– Monitoring Reads and Writes to a File and device

Posted by admin on May 13th, 2013

1.配合使用systemtap 监控系统对于文件的读写:

[root@db-42 systemtap]# uname -a
Linux db-42 2.6.18-194.el5 #1 SMP Mon Mar 29 22:10:29 EDT 2010 x86_64 x86_64 x86_64 GN[......]

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linux tools part 7– Monitor socket activity

Posted by admin on April 23rd, 2013

systemtap发行版本提供了socktop,用于监控socket套接字之间的通信,具体如下:

[root@db-42 ~]# socktop -h
USAGE: socktop [-d] [-i interval] [-N num] [-P protocol]... [-f family].[......]

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gdb 调试TPCC 一例

Posted by admin on March 19th, 2013

TPCC对mysql 5.5.27做一次性能测试时遭遇 Segmentation fault,gdb调试记录之:

[root@db-81 ~]# uname -a 
Linux db-81 2.6.18-194.el5 #1 SMP Mon Mar 29 22:10:29 EDT 2010[......]

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linux tools part 6– network Monitoring (2)

Posted by admin on March 19th, 2013

基于上次的nicstat linux还提供了nethogs,可以监控指定pid的具体流量,在这里可以下到源码.

获取过程:

open("/proc/$pid/fd")
open("/proc/net/tcp")
open("/proc[......]

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