发布时间：2014-05-28 13:53:31
1. lsof | more 看是哪个进程在用已删除的文件ora_jxxx是系统job进程，可以用select * FROM DBA_JOBS_RUNNING查询如果查不到，就是死进程，可以kill如果能查到，看看是不是dml的还是纯查询，纯查询应该可以kill......【阅读全文】
发布时间：2013-09-16 15:17:40
一、MySQL复制概述 MySQL支持单向、异步复制，复制过程中一个服务器充当主服务器，而一个或多个其它服务器充当从服务器。MySQL复制基于主服务器在二进制日志中跟踪所有对数据库的更改(更新、删除等等)。因此，要进行复制，必须在主服务器上启用二进制日志。每个从服务器从主服务器接收主服务器上已经记录到其.........【阅读全文】
发布时间：2013-08-21 15:08:21
The logical entities in an HBase schema are as follows:■ Table—HBase organizes data into tables. Table names are Strings and composed of characters that are safe for use in a file system path.■ Row—Within a table, data is stored according to its row. Rows are identified uniquely by their row.........【阅读全文】
发布时间：2013-07-03 08:31:31
PostgreSQL settings can be manipulated a number of different ways, but generally you will want to update them in your postgresql.conf file. The specific options available change from release to release, the definitive list is in the source code at src/backend/utils/misc/guc.c for your version of PostgreSQL (but the pg_settings view works well enough for most purposes).......【阅读全文】
