As 2011 has been closed and 2012 has started, we wanted to take the opportunity to thank each of you for your contribution and effort for sybaseblog.com  during the past few years. Despite the difficult circumstances, there is much we have achieved and is much to be proud of.

Our ongoing efforts are crucial to improve the knowledge sharing and Sybase excellence.

I would like to invite you all to contribute focus and determination to create a SAP Sybase Database community by leveraging http://sybaseblog.com SAP Database knowledge sharing blog.

We should be under no doubt that we have the skills, expertise and most importantly attitude to address the real time challenges using Sybase technologies in conjunction with SAP Sybase platform.

If you are SAP HANA ,Sybase ASE/Rep/IQ/ASA expert/learner and would like the part of sybaseblog.com :A Blog for SAP Database Technologies, you are most welcome.

We will hear you : sybanva@gmail.com.

Happy Sybase Learning !

Team, Sybaseblog.com.

Any One Who is Working on SAP Products, SAP HANA, SAP Sybase ASE/IQ/REP/CEP in backend can join this community.
http://www.sap.com/solutions/technology/database.epx

SAP Database Technology : SAP HANA, SAP Sybase ASE/IQ/Rep/CEP

Function Categories  & Features
Performance
• JDBC/ODBC driver performance enhancements
• QP performance enhancements (e.g. Pre computed Result Sets, shared query plans)
• Fast logged BCP
• Faster database starts

VLDB Management & Operational Scalability
•Online Utilities and maintenance (e.g. create index/reorg)
•Alter Table Drop Column with no data movement
•Compression of in‐row LOBS
•Split/Merge/Move Partition
•Better integration of Backup and Restore Operations
•SCC : Monitoring and Administration updates
•Database dumps with concurrent transactions
•Compressed shared memory dumps
•64TB database support
•Deferred Table Creation

Encryption/Security
•Data Privacy
•Granular permission controls ‐Limiting power of SAs/DBOs

Application Development & Developer Productivity
•MERGE statement with trigger support

ASE Replication
•ASE Replication Performance features ‐Multiple log scanners, Disabling of RI checks

Source : Sybase.com (Webcast)

Below Data Cache configuration can improve the performance:

• Configure named data caches to be large enough to hold critical tables and indexes. This keeps other server activity from contending for cache space and speeds queries using these tables, since the needed pages are always found in cache. Can configure these caches to use the relaxed LRU replacement policy, reducing the cache overhead.
• To increase concurrency, bind a hot table to one cache and the indexes on the table to other caches.

• Create a named data cache large enough to hold the hot pages of a table where a high percentage of the queries reference only a portion of the table.

For example, if a table contains data for a year, but 75% of the queries reference data from the most recent month (about 8% of the table), configuring a cache of about 10% of the table size provides room to keep the most frequently used pages in cache and leaves some space for the less frequently used pages

• Assign tables or databases used in decision-support systems (DSS) to specific caches with large I/O configured.
This keeps DSS applications from contending for cache space with OLTP applications. DSS applications typically access large numbers of sequential pages, and OLTP applications typically access relatively few random pages.

• Bind tempdb to its own cache to keep it from contending with other user processes. Proper sizing of the tempdb cache can keep most tempdb activity in memory for many applications. If this cache is large enough, tempdb
activity can avoid performing I/O.

• Bind text pages to named caches to improve the performance on text access.
• Bind a database’s log to a cache, again reducing contention for cache space and access to the cache.

Basically Statement Cache is a part of Procedure Cache, when enabled the statement cache reserves a portion of procedure cache.

ASE maintains MRU/LRU (most recently used/least recently used) algorithm. Stored procedures generally preferred over separate SQL statements because when users execute stored procedure, Adaptive server search procedure cache for existing query plan. If it is available then execution begins.

If Query plan is not available or all copies are in use, if multiple users are executing same stored procedure at a time then multiple copies of query plan will be available in procedure cache until size of cache is supporting, then query tree for the procedure is read from the sysprocedures table  .  Then query tree is then optimized, based on the parameters passed to the procedures and converted into query plan and then execution begins.

Description
Key Features:

1. Search Sybase Error Code and Adaptive Server Anywhere SQLCODEs to find error description
2. Partial search available
3. Negative error code need not be supplied for Adaptive Server Anywhere SQLCODEs

We are preparing the Sybase ASE Brainstorming Question Series.

In this series we will put the questions topic wise as well as hands on (day-to-day troubleshooting) questions.

For all questions, We will also include the answers as well

Please forward your advices/suggestions on Link .

http://wp.me/P1RFmy-nI

We are waiting to hear from your side.

Thanks.

Team,sybaseblog.com

Adaptive Server keeps track of the various pieces of each database in master.dbo.sysusages. Each entry in sysusages describes one fragment of a database. Fragments are a contiguous group of logical pages, all on the same
device, that permit storage for the same group of segments. Fragments are also known as “disk pieces.”

Source: Sybooks.sybase.com

As SAP disclosed its database plans on Apr 10 2012 press conf and If you go through the Sybase point of view for Sybase Technologies with SAP Real Time Data Platform, Its certainly a great move in technology front for ASE,IQ,Rep Server & ASA.

SAP HANA is superb innovation from SAP and it’s integration with Sybase Data Management Products will put these product miles ahead with others.

Definitely It is very good news for Sybase folks!

Now we are also changed our tag-line for showing our support  with this vision of SAP Sybase..& keep your blog in sync with same.

“Anything About Sybase ASE,Replication Server & Sybase IQ“

to

“Anything About SAP HANA,SAP Sybase ASE,SAP Sybase Replication Server & SAP Sybase IQ“