一直以来都没有碰到过perm区 gc问题，最近一个项目代码重构，惊现perm区 gc问题。

ngrinder 参数化取值的时候，不如LR便捷。

在做unique取参的时候，LR简单的设置即可，ngrinder就要相对麻烦一些。

Interceptor拦截器作为AOP的一种实现，经常用于日志记录、权限验证、恶意请求、数据稽核、性能监控等。

Apache Shiro? is a powerful and easy-to-use Java security framework that performs authentication, authorization, cryptography, and session management. With Shiro’s easy-to-understand API, you can quickly and easily secure any application – from the smallest mobile applications to the largest web and enterprise applications.

by https://shiro.apache.org/

The Best APIs are Built with Swagger Tools.

by https://swagger.io/

Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache and message broker. It supports data structures such as strings, hashes, lists, sets, sorted sets with range queries, bitmaps, hyperloglogs and geospatial indexes with radius queries. Redis has built-in replication, Lua scripting, LRU eviction, transactions and different levels of on-disk persistence, and provides high availability via Redis Sentinel and automatic partitioning with Redis Cluster.

by https://redis.io/

iBase4J确实是少有的开源精品之作，几位作者真是有心了。

iBase4J是JAVA分布式快速开发平台：
集成Spring，SpringBoot 2.0，SpringMVC，Mybatis，mybatis-plus，motan/dubbo分布式，Redis缓存，

Shiro权限管理，Spring-Session单点登录，Quartz分布式集群调度，Restful服务，QQ/微信登录，App token登录，微信/支付宝支付；

日期转换、数据类型转换、序列化、汉字转拼音、身份证号码验证、数字转人民币、发送短信、发送邮件、加密解密、图片处理、

excel导入导出、FTP/SFTP/fastDFS上传下载、二维码、XML读写、高精度计算、系统配置工具类等等。

有台db2数据库，没有任何请求的情况cpu波动很大。

通过db2top查看哪些sql在执行。