石头记

Oracle start with 1select * from tablename start with cond1 connect by cond2 where cond3; 简单说来是将一个树状结构存储在一张表里，比如一个表中存在两个字段: id,parentid。那么通过表示每一条...

Oracle rank As an analytic function, RANK computes the rank of each row returned from a query with respect to the other rows returned by the query,...

测试工具 Quality Center9.2/10.0,以前称为Test Director 8。 管理Release Cycle，Test Case，Test Case 执行，defect,相互关联，报告，需求变更   自动化测试 Quick Test Professional...

RMI / RPC / Web Service 调用时需要客户端服务端维护同样的调用接口? 利用java的对象流传送对象，将服务器端的任务以对象的方式传送给客户端，客户端同样适用对象流接收任务，并复原对象的各个属性。 ObjectOutputStream和ObjectInp...

TCP连接状态*Count the number of links in various TCP states 1netstat -n | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]...

TCP连接状态 统计各种TCP状态的链接数 1netstat -n | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}'

java heap dump JPS-ML obtains Java process ID PID jmap dump: format=b, file=heap. dump [pid] or jmap hot pid>dump. log jhat heap.dump ...

java heap dump jps -ml 得到java进程号 pid jmap -dump:format=b,file=heap.dump [pid] 或者 jmap -histo pid > dump.log jhat heap.dump 访问http://lo...

Reids各版本特性 Redis 4 feature module psync2 LFU eviction policy mixed rdb-aof format del/flushall/flushdb async MEMORY command CLUSTER DOCKE...

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