[20190419]shared latch spin count.txt

【[20190419]shared latch spin count.txt】的更多相关文章

[20190419]shared latch spin count.txt

[20190419]shared latch spin count.txt --//昨天测试exclusive latch spin count = 20000(缺省).--//今天测试shared latch spin count的情况,看了一些文章测试等于2 *_spin_count.--//有了昨天的测试经验,今天测试应该相对容易一些,不过shared latch有两种模式: For the shared latches Oracle 10g uses kslgetsl(laddr, wa…

[20190419]shared latch spin count 2.txt

[20190419]shared latch spin count 2.txt --//上午测试shared latch XX模式的情况,链接:http://blog.itpub.net/267265/viewspace-2641902/--//继续测试其它情况.--//链接:http://andreynikolaev.wordpress.com/2011/01/14/spin-tales-part-2-shared-latches-in-oracle-9-2-11g/ S mode get …

[20190418]exclusive latch spin count.txt

[20190418]exclusive latch spin count.txt--//昨天测试"process allocation" latch,主要这个latch与其它拴锁spin方式有点不同,但是缺省都是spin 20000.如何验证一直是困扰我的问题.--//而且现在的模式是spin 一定数量后,调用semop睡眠,等待唤醒.在这步消耗cpu资源很少.而不是像以前反复spin,指数回退.--//链接:http://andreynikolaev.wordpress.com/20…

[20190416]查看shared latch gets的变化.txt

[20190416]查看shared latch gets的变化.txt 1.环境:SYS@book> @ ver1PORT_STRING VERSION BANNER------------------------------ -------------- --------------------------------------------------------------------------------x86_64/Linux 2…

[20190416]完善shared latch测试脚本2.txt

[20190416]完善shared latch测试脚本2.txt --//昨天测试shared latch,链接:http://blog.itpub.net/267265/viewspace-2641414/,感觉有点开窍了.^_^. http://andreynikolaev.wordpress.com/2010/11/17/shared-latch-behaves-like-enqueue/ For the shared latches Oracle 10g uses kslgetsl(l…

[20190415]关于shared latch(共享栓锁).txt

[20190415]关于shared latch(共享栓锁).txt http://andreynikolaev.wordpress.com/2010/11/17/shared-latch-behaves-like-enqueue/ For the shared latches Oracle 10g uses kslgetsl(laddr, wait, why, where, mode) function. Oracle 11g has kslgetsl_w()function with the…

[20190416]exclusive latch测试脚本.txt

[20190416]exclusive latch测试脚本.txt --//昨天做了shared latch的测试脚本,今天完善exclusive latch测试脚本,上个星期的测试我是手工执行的.--//今天写一个脚本验证看看.相关链接:http://blog.itpub.net/267265/viewspace-2641414/ => [20190415]关于shared latch(共享栓锁).txthttp://blog.itpub.net/267265/viewspace-264149…