niyunjiu
- 浏览: 835321 次
- 性别:
- 来自: 北京
-
最新评论
-
zjhzwx1212：
为什么用threadLocal后，输出值是从20开始的,而定义 ...
j2ee的线程安全--threadlocal -
aeoluspu：
不错 mysql 测试部分感觉不详细
用sysbench(或者super-smack）测试mysql性能 -
nanPrivate：
有没有例子，只理论，实践起来还是不会啊
JMS可靠消息传送 -
lwclover：
一个网络工程师 装什么b
postfix 如何删除队列中的邮件 -
maimode：
我也欠缺不少啊
理想的计算机科学知识体系
文章列表
找出mysql中最大的表
- 博客分类：
- mysql/postgresql
SELECT concat(round(table_rows/1000000,2),'M',' rows'),concat(round(data_length/(1024*1024*1024),2),'G',' DATA'),concat(round(index_length/(1024*1024*1024),2),'G',' idx'),concat(round((data_length+index_length)/(1024*1024*1024),2),'G',' total_size'),concat(round(index_length/data_length,2),' idxratio ...
fs.file-max=51200
net.core.netdev_max_backlog = 32768
net.core.somaxconn = 32768
net.core.wmem_default = 8388608
net.core.rmem_default = 8388608
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
#net.ipv4.tcp_timestamps = 0
#net.ipv4.tcp_tw_len = 1
net.ipv4.tcp_mem = 94500000 915000 ...
DNS
DNS记录，需要你到你的域名托管商那里进行设置或者你自己管理DNS服务器。不少域名托管商不支持txt记录或者不支持DKIM记录，所以你就无法使用SPF和DKIM的功能。
DNS的修改，需要48小时以上才能生效。
国内的万网是不支持 ...
http://wiki.secondlife.com/wiki/Message_Queue_Evaluation_Notes
http://www.westnet.com/~gsmith/content/linux-pdflush.htm
The Linux Page Cache and pdflush:
Theory of Operation and Tuning for Write-Heavy Loads
As you write out data ultimately intended for disk, Linux caches this information in an
area of memory called the page cache. You can find ...
http://www.linuxlinks.com/article/20101024141930129/ServerProvisioning.html
FAI
High quality tool for fully automatic installation of
Linux systems
xCAT
Extreme
Cluster Administration Toolkit
Spacewalk
Systems management software developed by Red Hat
Cobbler
OS
provi ...
最佳开源配置管理工具： Puppet
/ 提名：OpenQRM, Cfengine, Chef ,Bcfg2
优化ext3的mount选项
- 博客分类：
- 系统管理
defaults,commit=600,noatime,nodiratime
http://www.xasun.com/article/2a/1991$3.html
1.With the Xeon 5500 series processorsIntel has diverged from its traditional Symmetric Multiprocessing (SMP) architectureto a Non-Uniform Memory Access (NUMA) architecture.In a two-processor scenario, the Xeon5500 series processors are connected throug ...