网站综合信息 dbtan.com
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    • dbtan.com - dbtan 谈DB 
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    • 域名年龄:15年11个月4天  注册日期:2009年08月27日  到期时间:2019年08月27日
      邮箱:abuse  电话:+86.4006008500
      注册商:HICHINA ZHICHENG TECHNOLOGY LTD. 
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    dbtan.com

    域名年龄: 15年11个月4天
    注册时间: 2009-08-27
    到期时间: 2019-08-27
    注 册 商: HICHINA ZHICHENG TECHNOLOGY LTD.
    注册邮箱: abuse
    联系电话: +86.4006008500

    获取时间: 2015年03月21日 05:20:15
    Domain Name: DBTAN.COM
    Registrar: HICHINA ZHICHENG TECHNOLOGY LTD.
    Sponsoring Registrar IANA ID: 420
    Whois Server: grs-whois.hichina.com
    Referral URL: http://www.net.cn
    Name Server: DNS21.HICHINA.COM
    Name Server: DNS22.HICHINA.COM
    Status: ok http://www.icann.org/epp#OK
    Updated Date: 2012-12-20
    Creation Date: 2009-08-27
    Expiration Date: 2019-08-27

    >>> Last update of whois database: Fri, 2015-Mar-20 21:24:34 GMT <<<

    For more information on Whois status codes, please visit
    https://www.icann.org/resources/pages/epp-status-codes-2014-06-16-en.
    Domain Name:dbtan.com
    Registry Domain ID:
    Registrar WHOIS Server: whois.hichina.com
    Registrar URL: http://www.net.cn/
    Updated Date:2012-12-20T01:57:50Z
    Creation Date:2009-08-27T10:29:40Z
    Registrar Registration Expiration Date:2019-08-27T10:29:40Z
    Registrar: HICHINA ZHICHENG TECHNOLOGY LTD.
    Registrar IANA ID: 420
    Registrar Abuse Contact Email: abuse
    Registrar Abuse Contact Phone: +86.4006008500
    Reseller:
    Domain Status:
    Registry Registrant ID:whois-protect
    Registrant Name:YinSi BaoHu Yi KaiQi (Hidden by Whois Privacy Protection Service)
    Registrant Organization:YinSi BaoHu Yi KaiQi (Hidden by Whois Privacy Protection Service)
    Registrant Street:3/F.,HiChina Mansion,No.27 Gulouwai Avenue,Dongcheng District,Beijing 100120,China,
    Registrant City:Beijing
    Registrant State/Province:Beijing
    Registrant Postal Code:100120
    Registrant Country:CN
    Registrant Phone:+8610.65985888
    Registrant Phone Ext:
    Registrant Fax:+8610.65985438
    Registrant Fax Ext:
    Registrant Email:YuMing
    Registry Admin ID:whois-protect
    Admin Name:YinSi BaoHu Yi KaiQi (Hidden by Whois Privacy Protection Service)
    Admin Organization:YinSi BaoHu Yi KaiQi (Hidden by Whois Privacy Protection Service)
    Admin Street:3/F.,HiChina Mansion,No.27 Gulouwai Avenue,Dongcheng District,Beijing 100120,China,
    Admin City:Beijing
    Admin State/Province:Beijing
    Admin Postal Code:100120
    Admin Country:CN
    Admin Phone:+8610.65985888
    Admin Phone Ext:
    Admin Fax:+8610.65985438
    Admin Fax Ext:
    Admin Email:YuMing
    Registry Tech ID:whois-protect
    Tech Name:YinSi BaoHu Yi KaiQi (Hidden by Whois Privacy Protection Service)
    Tech Organization:YinSi BaoHu Yi KaiQi (Hidden by Whois Privacy Protection Service)
    Tech Street:3/F.,HiChina Mansion,No.27 Gulouwai Avenue,Dongcheng District,Beijing 100120,China,
    Tech City:Beijing
    Tech State/Province:Beijing
    Tech Postal Code:100120
    Tech Country:CN
    Tech Phone:+8610.65985888
    Tech Phone Ext:
    Tech Fax:+8610.65985438
    Tech Fax Ext:
    Tech Email:YuMing
    Name Server:dns21.hichina.com
    Name Server:dns22.hichina.com
    DNSSEC:unsigned
    URL of the ICANN WHOIS Data Problem Reporting System: http://wdprs.internic.net/
    >>> Last update of WHOIS database:2012-12-20T01:57:50Z<<<

    Registry Billing ID:whois-protect
    Billing Name:YinSi BaoHu Yi KaiQi (Hidden by Whois Privacy Protection Service)
    Billing Organization:YinSi BaoHu Yi KaiQi (Hidden by Whois Privacy Protection Service)
    Billing Street:3/F.,HiChina Mansion,No.27 Gulouwai Avenue,Dongcheng District,Beijing 100120,China,
    Billing City:Beijing
    Billing State/Province:Beijing
    Billing Postal Code:100120
    Billing Country:CN
    Billing Phone:+8610.65985888
    Billing Phone Ext:
    Billing Fax:+8610.65985438
    Billing Fax Ext:
    Billing Email:YuMing

    Important Reminder: Per ICANN 2013RAA`s request, Hichina has modified domain names`whois format of dot com/net/cc/tv, you could refer to section 1.4 posted by ICANN on http://www.icann.org/en
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    网站首页快照(纯文字版)
    抓取时间:2014年04月10日 20:25:15
    网址:http://dbtan.com/
    标题:dbtan.com - dbtan 谈DB
    关键字:dbtan,Oracle,Linux,Oracle Database,Oracle PL/SQL,Oracle RAC,SQL,DBA
    描述:dbtan的生活、Oracle及Linux学习笔记、观点 说,永远易于做!
    主体:
    dbtan 谈DBdbtan的生活、Oracle及Linux学习笔记、观点                                                                                                                                        说,永远易于做! Home关于存档        关闭侧边栏  显示侧边栏How To Automate Cleanup Of Dead Connections And INACTIVE Sessions [ID 206007.1] Posted by dbtan on 九月 15th, 2010How To Automate Cleanup Of Dead Connections And INACTIVE Sessions [ID 206007.1]Modified 25-JUN-2009     Type HOWTO     Status PUBLISHED PURPOSE
    -------This note explains the difference between a dead connection and an
    INACTIVE session in v$session.  It also discusses the mechanisms
    provided to automate the cleanup of each.SCOPE & APPLICATION
    -------------------This note is intended for any DBA who wants to automate the cleanup of
    dead connectio... ... Oracle, Oracle数据库管理, Trouble Shooting 2 Comments »认领博客 dbtan 谈DB Posted by dbtan on 六月 20th, 2010认领博客 dbtan 谈DBQQREADERF129F7D46654828B 默认分类 2 Comments »Oracle 10g/11g Latch机制的变化 Posted by dbtan on 五月 13th, 2010Oracle 10g/11g Latch机制的变化:前面曾经提到,Oracle的Latch机制采用spin来进行持有CPU的不断尝试,虽然通常Latch的获取会非常快(一般在微秒级),但是很多时候Latch竞争还是会引发极为严重的CPU争用。所以从Oracle 10g开始,Oracle尝试引入一种新的机制来代替传统的Latch机制,这就是Mutex机制,也就是互斥机制。和Latch相比,一个Mutex Get大约仅需要30~35个指令,而Latch Get则需要大约150~200个指令,同时在大小上,每个Mutex仅占大约16Bytes空间,而Latch在10gR2中要占用大约112Bytes空间。在Oracle 10.2..0.1中一个新的参数_kks_use_mutex_pin被引入,不过缺省值为False:sys@TQGZS> select x.k... ... Oracle, 深入解析Oracle, 读书笔记 No Comments »Latch Free(闩锁释放) Posted by dbtan on 五月 13th, 2010Latch Free(闩锁释放):Latch Free通常被称为闩锁释放,这个名称常常引起误解,实际上我们应该在前面加上一个“等待”(wait),当数据库出现这个等待时,说明有进程正在等待某个Latch被释放,也就是waiting latch free。Latch是一种低级排队(串行)机制,用于保护SGA中共享内存结构。Latch就像是一种快速被获取和释放的内存锁,用于防止共享内存结构被多个用户同时访问。其实不必把Latch想得过于复杂,Latch通常就是操作系统利用内存中的某个区域,通过设置变量为0或非0,来表示Latch是否已经被取得,大多数操作系统,是使用TEST AND SET的方式来完成Latch检查或持有的。为了快速地获得一个直观认识,以下... ... Oracle, 深入解析Oracle, 读书笔记 No Comments »Enqueue (队列等待) Posted by dbtan on 五月 13th, 2010Enqueue (队列等待):Enqueue是一种保护共享资源的锁定机制。该锁定机制保护共享资源,以避免因并发操作而损坏数据,比如通过锁定保护一行记录,避免多个用户同时更新。Enqueue采用排队机制,即FIFO(先进先出)来控制资源的使用。在Oracle 10g之前,Enqueue事件是一组锁定事件的集合,如果数据库中这个等待事件比较显著,我们还需要进一步来追踪是哪个类别的锁定引发了数据库等待。从Oracle 10g开始,Oracle对于队列等待进行了细分,v$event_name视图中可以查询这些细分后的等待事件,简要摘录几个示例如下:sys@CCDB> select name,wait_class  2  from v$event_name  &nb... ... Oracle, 深入解析Oracle, 读书笔记 No Comments » Page 1 of 1912345678...»末页 »订阅 | RSS FeedAll Posts FeedAll Comments Feed分类目录 | CatalogLinux (9)Oracle (82)Oracle备份与恢复 (2)Oracle数据库管理 (3)Trouble Shooting (3)读书笔记 (73)深入解析Oracle (73)默认分类 (2)标签云 | Tag Cloudapache backup politic Binding variable and cursor_sharing Buffer Cache dns Event EXP-00091 Flush Shared Pool ftp imp LAMP Library Cache Pin and Library Cache Lock Linux linux log manager and item integration linux troubleshooting nfs nologging OEM ORA-04031 Oracle Oracle基本信息检查 Oracle子缓冲池SubPool Redo Result Cache samba sendmail Shared Pool dump and analysis Shared Pool Latch和Library Cache Latch竞争 Shared Pool 的基本原理 SHARED_POOL_RESERVED_SIZE sqlloader squid Trouble Shooting Undo usbloading fo

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