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Performance Engineering and Capacity PlanningTopics relating to performance engineering and analysis, capacity planning, Solaris, Linux and Storage tuning as related to large scale oracle deployments.
http://dsstos.blogspot.com/
Topics relating to performance engineering and analysis, capacity planning, Solaris, Linux and Storage tuning as related to large scale oracle deployments.
http://dsstos.blogspot.com/
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Performance Engineering and Capacity Planning | dsstos.blogspot.com Reviews
https://dsstos.blogspot.com
Topics relating to performance engineering and analysis, capacity planning, Solaris, Linux and Storage tuning as related to large scale oracle deployments.
dsstos.blogspot.com
Performance Engineering and Capacity Planning: March 2009
http://dsstos.blogspot.com/2009_03_01_archive.html
Performance Engineering and Capacity Planning. Topics relating to performance engineering/analysis, capacity planning, application impact and forensics etc as related to large scale deployments. Sunday, March 8, 2009. Temporary Tablespaces on Oracle - going the extra mile. At first, I thought this was a limitation on the raw volumes which we were using for the temporary tablespaces, but a test using dd to the raw volumes showed that we could go upto 4M/IOP without the IO request getting broken up (this w...
Performance Engineering and Capacity Planning: July 2009
http://dsstos.blogspot.com/2009_07_01_archive.html
Performance Engineering and Capacity Planning. Topics relating to performance engineering/analysis, capacity planning, application impact and forensics etc as related to large scale deployments. Monday, July 20, 2009. Map Disk Block devices on a Linux host back to the SAN Lun. There was a question posted in Oracle-L - How can one map Disk Devices (On Linux) back to the SAN LUNs? Most of you would wonder – why do I care to know about this mapping? Containing the data file). On Redhat 4.x and higher ve...
Performance Engineering and Capacity Planning: January 2010
http://dsstos.blogspot.com/2010_01_01_archive.html
Performance Engineering and Capacity Planning. Topics relating to performance engineering/analysis, capacity planning, application impact and forensics etc as related to large scale deployments. Wednesday, January 27, 2010. Understanding CPU Time as an Oracle Wait event. We have all seen "CPU Time" as a Top 5 wait event at one point or the other when troubleshooting performance issues. From an administrator (DBA/SA) perspective, conventional thinking would be that CPU is a bottleneck. Scheduling is a key...
Performance Engineering and Capacity Planning: Joins - ANSI SQL versus Traditional Oracle (+) syntax
http://dsstos.blogspot.com/2010/02/joins-ansi-sql-versus-traditional.html
Performance Engineering and Capacity Planning. Topics relating to performance engineering/analysis, capacity planning, application impact and forensics etc as related to large scale deployments. Tuesday, February 2, 2010. Joins - ANSI SQL versus Traditional Oracle syntax. Sometime back (maybe with 9i? Oracle introduced support for the ANSI join syntax - inner join, full outer join, left outer join and right outer join. This could be used in place of the operator. February 3, 2010 at 1:44 AM. Never real...
Performance Engineering and Capacity Planning: Basic Performance Tuning settings for the Solaris OS for Datawarehouse Loads
http://dsstos.blogspot.com/2007/10/basic-settings-for-solaris-os-to-meet.html
Performance Engineering and Capacity Planning. Topics relating to performance engineering/analysis, capacity planning, application impact and forensics etc as related to large scale deployments. Friday, October 5, 2007. Basic Performance Tuning settings for the Solaris OS for Datawarehouse Loads. Etc/system (Both Vxvm and OS settings). Set the File Descriptors. The defaults are way too low and need to be bumped up. For Solaris 10, increasing the rlim fd cur should suffice. Set rlim fd max=8192. The value...
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IT 研究室 ( 前IT DBA's 資訊站): FW: MSSQL Step-by-Step Approach to Differential Backup and Recovery
http://jaychu649.blogspot.com/2015/08/fw-mssql-step-by-step-approach-to.html
IT 研究室 ( 前IT DBA's 資訊站). 星期一, 8月 03, 2015. FW: MSSQL Step-by-Step Approach to Differential Backup and Recovery. 2BACKUP LOG WITH TRUNCATE ONLY :. Point in time recovery or transaction log recovery from backup. Or recover to log sequence(. Or recover to contain marked transaction. Sql server 2014 full recovery model. Full recovery model or bulk-logged recovery model, simple recovery model. Point in time recovery ,. Step-by-Step Approach to Differential Backup and Recovery. Jul 26, 2011. Differential backu...
IT 研究室 ( 前IT DBA's 資訊站): FW: SQL Server Connection Strings
http://jaychu649.blogspot.com/2015/08/fw-sql-server-connection-strings.html
IT 研究室 ( 前IT DBA's 資訊站). 星期四, 8月 06, 2015. FW: SQL Server Connection Strings. Ref: http:/ weblogs.sqlteam.com/dang/archive/2011/07/10/sql-server-connection-strings.aspx. SQL Server Connection Strings. In this post, I’ll provide a connection string overview and discuss SqlClient connection strings and examples. I’ll discuss OLE DB and ODBC (used via ADO or ADO.NET) and JDBC in more detail the future articles. The purpose of a connection string is to supply a SQL Server provider/driver with the information...
Filter predicates after MIN aggregation | Vishal desai's Oracle Blog
https://vishaldesai.wordpress.com/2015/05/11/filter-predicates-after-min-aggregation
Vishal desai’s Oracle Blog. May 11, 2015. Filter predicates after MIN aggregation. Filed under: Performance Tuning. 8212; vishaldesai @ 8:41 pm. One of OLTP SQL on Exadata was consuming lot of CPU and was running for about 8 seconds per execution. Most of CPU activity was towards bottom half of the SQL as shown in real time SQL monitoring report below. Leave a Comment ». Feed for comments on this post. Leave a Reply Cancel reply. Enter your comment here. Address never made public). You are commenting usi...
Compare Oracle Database Parameters in Excel | Vishal desai's Oracle Blog
https://vishaldesai.wordpress.com/2014/10/03/compare-oracle-database-parameters-in-excel
Vishal desai’s Oracle Blog. October 3, 2014. Compare Oracle Database Parameters in Excel. Filed under: Performance Tuning. 8212; vishaldesai @ 2:13 pm. It will highlight differences in red. I have added logic to mark it blue if values are different for parameters instance number, thread, undo tablespace and local listener. You can add more parameters to that logic for further customization. Download xlsm file, add tns alias to tnsnames.ora file on your windows client and start comparing parameters. Forre...
Database Time Viewer | Vishal desai's Oracle Blog
https://vishaldesai.wordpress.com/2014/04/18/database-time-viewer
Vishal desai’s Oracle Blog. April 18, 2014. 8212; vishaldesai @ 2:31 pm. Create SQL and Batch scripts with proper path settings: Script dbtimemonitor.sql set head off set feed off set linesize 200 set pages 9999 set feedback off set verify off set pagesize 0 set term off spool C: dbtime path databases.xml select '? Xml version = ' ' ' '1.0' ' ' ' encoding = ' ' ' 'UTF-8' ' ' '? C: path dbtime.bat dbuser dbpassword dbtns. Leave a Comment ». Feed for comments on this post. Leave a Reply Cancel reply. Creat...
Compare Oracle SQL Plan in Excel | Vishal desai's Oracle Blog
https://vishaldesai.wordpress.com/2014/10/03/compare-oracle-sql-plan-in-excel
Vishal desai’s Oracle Blog. October 3, 2014. Compare Oracle SQL Plan in Excel. Filed under: Performance Tuning. 8212; vishaldesai @ 2:36 pm. Download xlsm file, input source and target details, double click on list box to populate plan hash values and select one item and click on Run button to compare plan. The output screen will highlight first line (only first) where it finds difference in operation. 2 Comments ». Run-time error ’94’:. Invalid use of Null. See below for screenshot…. Comment by Max Scalf.
IT 研究室 ( 前IT DBA's 資訊站): [轉貼]linux 清理緩存
http://jaychu649.blogspot.com/2012/04/linux.html
IT 研究室 ( 前IT DBA's 資訊站). 星期五, 4月 13, 2012. Http:/ www.360doc.com/content/11/1028/15/1162697 159865156.shtml. Echo 3 /proc/sys/vm/drop caches. Writing to this will cause the kernel to drop clean caches, dentries and inodes from memory, causing that memory to become free. Echo 1 /proc/sys/vm/drop caches. To free dentries and inodes:. Echo 2 /proc/sys/vm/drop caches. To free pagecache, dentries and inodes:. Echo 3 /proc/sys/vm/drop caches. This tunable was added in. Vmdirty ratio = 1. Vmdirty ratio = 1.
IT 研究室 ( 前IT DBA's 資訊站): Oracle User profile --使用PROFILE來限制使用者資源
http://jaychu649.blogspot.com/2011/12/oracle-user-profile.html
IT 研究室 ( 前IT DBA's 資訊站). 星期四, 12月 01, 2011. Oracle User profile - 使用PROFILE來限制使用者資源. Http:/ www.itpub.net/viewthread.php? 1．動態地使用alter system或使用初始化參數resource limit使資源限制生效。 SQL show parameter resource limit. Resource limit boolean FALSE. SQL alter system set resource limit=true;. SQL show parameter resource limit;. Resource limit boolean TRUE. 2．使用create profile創建一個定義對資料庫資源進行限制的profile。 3．使用create user 或alter user命令把profile分配給使用者。 LIMIT { resource parameters. LOGICAL READS PER SESSION. Oracle資料庫以有利的方式計算cp...
IT 研究室 ( 前IT DBA's 資訊站): [轉載] Windows Server (FailOver Cluster) + SQL 2012 AlwaysOn 的注意事項
http://jaychu649.blogspot.com/2015/08/windows-server-failover-cluster-sql.html
IT 研究室 ( 前IT DBA's 資訊站). 星期一, 8月 10, 2015. 轉載] Windows Server (FailOver Cluster) SQL 2012 AlwaysOn 的注意事項. Http:/ www.dotblogs.com.tw/mis2000lab/archive/2013/12/16/sql 2012 alwayson availability group-again.aspx. Windows Server 2008 2012. Http:/ msdn.microsoft.com/en-us/library/hh781257.aspx. 時，使用「一般安裝」即可. 權限要夠高，不然會卡關（難怪大部分的網路文件，他們都用. 65288;靜態、固定）. 的「電腦名稱」或是相關的人員帳號。 如果會用到，請您要打開，不然就會卡關。例如. 步驟，是最簡單、最好實現的。 MVP - - Edwin Sarmiento. Step-By-Step: Creating a SQL Server 2012 AlwaysOn Availability Group. Simple範本...
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DS Automobiles Spirit of Avant-Garde. Tillbaka till driveDS.se. Kom och upplev nya DS 5 före alla andra. Nu har Sveriges första DS Store öppnat i Stockholm hos Hedin Bil i Akalla. Ett showroom för dig som värdesätter djärv, design, teknik och skönhet. Upplev något helt nytt i bilvärlden. 6 oktober 1955. Feberyra på Grand Palais i Paris. Knappt hade DS 19. Lanserats förrän den hade hänfört huvudstaden med sin raffinerade. Förening av estetik och teknologi. Denna avantgardistiska modell såldes. Från Stockh...
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Ds Store Remover | Get rid of unwanted .DS_Store (and Thumbs.db) files on your Mac
Get rid of unwanted .DS Store (and Thumbs.db) files on your Mac. Skip to primary content. A free and simple Mac utility. DS Store (Desktop Services Store) is a hidden file created by Mac OS X to store custom attributes of a folder such as the position of icons or the choice of a background image. By default, the Mac OS X Finder will create a .DS Store file in every folder that it accesses, even folders on remote systems (for example, folders shared over an SMB or AFP connection). Thanks for your app.
Performance Engineering and Capacity Planning
Performance Engineering and Capacity Planning. Topics relating to performance engineering/analysis, capacity planning, application impact and forensics etc as related to large scale deployments. Monday, April 11, 2011. 11gr2 - Analyzing Compression capabilities. To check the viability of compression for a typical use case, I conducted 5 tests -. Time to complete each activity. Object Size after each activity. As always, I used realistic example with real data (not generated). The tests were conducted...
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