aaqwsh与select同学测试的MHA文档,另外基于这个HA方案公司应该会部署一些核心应用。另外提供之前的MHA测试
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Author: admin
gdb 调试TPCC 一例
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[......]
linux tools part 6– network Monitoring (2)
Update exadata flash disk firmware due to poor performance on X2-2
ASR XD报警抛出如下错误
" dm01cel02: Hardware Error has been detected in the Flash Logs on the Cell Node dm01cel02: Please open up a Service Request[......]
linux tools part 5– Trace network information
Nmap (“Network Mapper”) is an open source tool for network exploration and security auditing. It was designed to rapidly scan large networks, although[……]
MySQL key partition and MongoDB TEST
对于业务的激活码需求做了一次关于mysql,mongodb的比对.mysql分为normal,key partition 数量分别是1亿和10亿数据,mysql采用直接访问PK键,partition key为PK,mysql table size 为90G,mongodb table size为15[……]
linux tools part 4– Monitor process IO state
linux tools part 3– Monitor process status
pidstat是一款很不错的针对linux pid状态监控的程序
The pidstat command is used for monitoring individual tasks currently being managed by the Linux kernel.
It writ[……]
linux tools part 2– network Monitoring
本来想写一篇关于nicstat的文章,霸爷已经写的非常好了参考这里nicstat 网络流量统计利器
这里说明一下使用nicstat 可以完美替代iptraf ,nload 等工具
同样可以替代watch –命令行模式:
eg:
Every 1.0s: /sbin/ifconfi[......]
linux tools part 1– Linux Kernel Performance
Perf is a profiler tool for Linux 2.6+ based systems that abstracts away CPU hardware differences in Linux performance measurementsand presents a simp[……]