-
编辑 删除
Configue sqlplus under linux env
1. Using 'Backspace' to delete:add 'stty erase ^h' to '/home/oracle/.bash_profile'then execute ' source .bash_profile's2. Use Line Up and Line Down keys to get the command ...
-
编辑 删除
内网查看出口IP
Windows: tracert www.google.comLinux: wget http://members.3322.org/dyndns/getip cat getip &...
-
编辑 删除
Hosts文件中一个域名绑定多个IP后处理机制
电脑在hosts文件中是由上往下查找ip，若无此IP则打不开网页，然后继续查找，若找到则可以打开IP，则不再继续查找，不论是否正确。因此，可以在hosts里绑定多个IP指向同一个网站，这样就可以增大打开该网站的...
-
编辑 删除
Webbench and Apachebench
Web Bench is very simple tool for benchmarking WWW or proxy servers. Uses fork() for simulating multiple clients and can use HTTP/0.9-HTTP/1.1 requests. This benchmark is not very realistic, ...
-
编辑 删除
Linux Performance Monitoring
-
编辑 删除
diff / sed/ histtimeformat
1. diff [-q][--brief][-y][--left] file1 file22. sed -i 's/stringReplaced/stringNew/' filename3. export HISTTIMEFORMAT = "%F %T" history
-
编辑 删除
SSH PuttyGen
PuttyGen : generate public and private keys used to login Linux after configuration without password,convinent.private key - keeped in localhost, and located into putty Authen.public key - transmit ...
-
编辑 删除
Linux Disk info
/* check disk space */cat /proc/diskinfodf [-a][-i][-t]du -sh/* check the process of the file deleted */lsof|grep deletekill pids/* cleanup content of a file*/cat /dev/null > filen...
-
编辑 删除
nmon and nmon analyser
nmon: linux and aix monitoring and analysis tool download and put on linux or aix,then chmod 755 nmon before the execution.usages:nmon -f -t -s interval -c count -m /path/log/nmo...
-
编辑 删除
1st. download installer and start 1st ruby script
1. start->programmes->ruby->start command prompt with ruby ruby -v: ruby 1.9.2p180<2011-02-18> [term 1.001]irb: interactive ruby programming environme...
-
编辑 删除
Oracle - 10053 Event
Event 10053 is used to dump optimizer decisions to trace file. Usage:{alter session set tracefile_identifier=' id_flag';alter session set events '10053 trace name context forever, lev...
-
编辑 删除
Terms in Execution plan & Optimization Trace
Cost: the value of this column does not have any particular unit of measurement; It is merely a weighted value used to compute costs of execution plans.Card: estimated by the cost-b...
