HP-UX调整内核参数_kmtune_kctune
http://blog.chinaunix.net/uid-261392-id-2478849.html
top使用小记
Top监控工具可以显示CPU占用率为前几位的进程,并提供CPU的实时活动情况。它是一个动态显示过程,即可以通过用户按键来不断刷新当前状态。如果在前台执行该命令,它将独占前台,直到用户终止该程序为止。比较准确...
oracle segment space management and extent management几则
--segment space mangement有2种方式;auto和manualSQL> create tablespace tbs_newly datafile 'd:\oracle11g_64bit\oradata\second\tbs_newly.dbf' size 10m extent management local autoallocate;Tablesp...
zt_eygle成功恢复案例:解决字典表误Truncate故障_diana_ada
http://www.eygle.com/archives/2008/01/truncate_dict_recovery.html 小结:1,sql.bsq 2,idl &...
v$librarycache小记一
---如果reload与pins的汇总比例大于1%,增加shared pool size SELECT SUM(PINS) "EXECUTIONS", SUM(RELOADS) "CACHE MISSES WHILE EXECUTING" ...
zt_powerdesigner_'find in diagram' 后弹出'the object has no symbol'
http://zhidao.baidu.com/question/500674726.html
library cache lock模拟小记
---压力测试的存储过程 ---测试用存储过程create or replace procedure proc_hard_parseasv_cnt pls_integer;beginfor i in 1..100000000 loopselect count(1) into v_cnt from t_hps...
oradebug poke模拟shared pool latch与硬解析原理小析
测试方法 1,如何模拟library cache load lock 2,查找上述latch的addr, 3,用oradebug poke上面的latch addr 4,另启一会话即发生关于上述latch wait参考资料: ...
oracle10g_oracle11g_library cache_shared pool管理方面的小区别
SQL> select * from v$version;BANNER----------------------------------------------------------------Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - ProdPL/SQL Release 10.2.0.1.0 - Producti...
zt_如何平面解决library cache lock和library cache pin
http://blog.163.com/dazuiba_008/blog/static/36334981201181335622771/
oracle 10049 event之library cache lock
测试环境:windows 7 oracle 10.2.0.1测试过程SQL> create table t_table(a int);Table created.SQL> select /*+first*/ count(1) from t_table; COUNT(1)---------- ...
zt_oracle11g 10049 event无法生成trace
http://www.dbsnake.net/2012/06
zt_如何使用event 10049分析定位library cache lock and library cache pin
http://www.cnblogs.com/springside-example/archive/2011/07/28/2529684.html
oracle library cache之library cache lock_library cache pin wait event释义
library cache load lock 1,此事件标记会话正在等待加载对象的lock2,加载对象时必须持有排它锁,防止其它会话加载相同的对象到library cache中3,3个参数:各为;等待加载的对象;等待加载对...
oracle library cache相关的等待事件及latch
Library cache中相关的latch包括:shared pool latch,  ...
oracle library cache之trace小记
/************获取查询sql的hash_value**********/SQL> select vl.sql_text,vl.HASH_VALUE from v$sql vl where vl.sql_text like '%t_hash%'; SQL_TEXT  ...
oracle substr_instr提取以/分隔之后一个/之后的内容
SQL> select * from t_instr; A--------------------------------------------------------------------------------/tymh_images/jc/termSpec/1366181827897iphone520121207144335793_2471.jpg/tymh_images/jc...
zt_阿里张瑞jacky关于library cache的内部管理机制
http://www.hellodb.net/2010/07/oracle-library-cache.html 评价: 三个字 非常好
zt_Oracle Library cache 内部机制 说明
http://blog.csdn.net/tianlesoftware/article/details/6629869
storage存储的cache缓存相关机制write-though和write-back(write-caching)
1,write-though即写操作直接写入磁盘,不使用缓存; 即关闭写缓存 这样就释放了更多缓存给读操作2,缓存用于读写操作3,write caching提升写操作的性能,因为先写到缓存中,再由存储的控制器定时把缓存...