Oracle Exadata Survival Guide (Expert's Voice in Oracle)
Oracle Exadata Survival Guide is a hands-on consultant for busy Oracle database directors who're migrating their ability units to Oracle's Exadata database equipment. The publication covers the options in the back of Exadata, and the on hand configurations for positive factors corresponding to shrewdpermanent scans, garage indexes, clever Flash Cache, hybrid columnar compression, and extra. you will find out about functionality metrics and execution plans, and the way to optimize SQL working in Oracle's strong, new atmosphere. The authors additionally disguise migration from different servers.
Oracle Exadata is quickly changing into the normal for giant installations similar to these operating facts warehouse, company intelligence, and large-scale OLTP structures. Exadata is like no different platform, and is new floor even for knowledgeable Oracle database directors. The Oracle Exadata Survival advisor is helping you navigate the fine details of this new platform, de-mystifying this outstanding equipment and its unparalleled functionality. The e-book takes a hugely useful method, now not diving too deeply into the main points, yet supplying you with simply the proper intensity of data to quick move your talents to Oracle's vital new platform.
- Helps move your abilities to the platform of the longer term
- Covers the $64000 floor with out going too deep
- Takes a realistic and hands-on method of daily tasks
What you’ll learn
- Learn the elements and easy structure of an Exadata laptop
- Reduce info move overhead by way of processing queries within the garage layer
- Examine and take motion on Exadata-specific functionality metrics
- Deploy Hybrid Columnar Compression to minimize garage and I/O wishes
- Create worry-free migrations from present databases into Exadata
- Understand and deal with matters particular to ERP migrations
Who this e-book is for
Oracle Exadata Survival Guide is for the busy firm Oracle DBA who has without warning been thrust into the Exadata arena. Readers must have a valid grab of conventional Oracle database management, and be ready to profit new features which are particular to the Exadata equipment.
The garage index couldn't forget about any of the blocks, even supposing there are segments that don't include the specified price. The minimal and greatest values saved for an listed phase don’t be sure that the specified price could be stumbled on, simply that there's a excessive likelihood that the price exists within the linked desk section. even if this instance used to be deliberately created to supply any such , it's also most probably that this might happen in a creation method, as typically taking place.
stored through garage index” statistic. bankruptcy nine will disguise the right way to allow CELLSRV tracing; beginning CELLSRV tracing calls for a restart of the cellphone, which factors the garage index segments to be dropped. the former queries, displaying (and no longer displaying) garage index mark downs including the execution plans to the generated output verifies that the optimizer won’t record any info at the garage indexes in use: SQL> set autotrace on SQL> SQL> choose /*+ parallel(4) */ 2 h.chicken_name,.
And Exadata improvements are usually not universal occurrences, yet they could take place, so it’s solid to recollect that garage indexes must be equipped as soon as the garage firmware has been patched or the garage servers were upgraded, both as garage upkeep or as a part of a complete Exadata patch/upgrade, and the garage cells were rebooted. one more reason for garage indexes to be re-created comprises upkeep at the flash cache undefined, the solar flash PCIe playing cards. 4 of those playing cards are.
garage software program treats shrewdpermanent Flash Cache as a write-through cache, bypassing it and writing on to disk. within the occasion that the flash disks are configured right into a flash disk, crew lack of the ESM will incur write consequences, because the dynamic cache isn't any longer on hand. the predicted life of those PCIe playing cards is 2 years, because the ESM will lose its skill to carry a cost. sunlight documentation states that those playing cards will be changed with out shutting down the process; Oracle Exadata.
The transaction should be demonstrated. more often than not on non-Exadata platforms, the database layer plays this processing. think having to ship those blocks again from the garage cells to the database layer to accomplish average consistent-read processing through the undo files. For a number of blocks, this is able to paintings on Exadata, however the danger exists that a really huge variety of blocks must be processed during this demeanour. functionality will be sluggish, robbing Exadata of 1 of its key gains.