crystal reports barcode font formula CH A PT ER 2 0 PERF O RMAN CE TUNI NG: TUN ING TH E I NS TA NCE in Font

Generator Code 3 of 9 in Font CH A PT ER 2 0 PERF O RMAN CE TUNI NG: TUN ING TH E I NS TA NCE

CH A PT ER 2 0 PERF O RMAN CE TUNI NG: TUN ING TH E I NS TA NCE
Printing Code 39 Extended In None
Using Barcode generator for Font Control to generate, create Code39 image in Font applications.
www.OnBarcode.com
Barcode Encoder In None
Using Barcode creation for Font Control to generate, create Barcode image in Font applications.
www.OnBarcode.com
Occasionally, you may have a situation where the buffer busy waits spike suddenly, seemingly for no reason. The sar utility (use the sar d option) might indicate high request queues and service times. This often happens when the disk controllers get saturated by a high amount of I/O. Usually, you see excessive core dumps during this time, and if core dumps are choking your I/O subsystem, do the following: Move your core dump directory to a less busy file system, where it resides by itself. Use the following init.ora or SPFILE parameters to control core dumps in your system. Setting these parameters values could reduce the size of a core dump to a few megabytes from a gigabyte or more: SHADOW_CORE_DUMP = PARTIAL /* or NONE */ BACKGROUND_CORE_DUMP = PARTIAL /* or NONE */ Investigate the core dumps and see whether you can fix them by applying necessary Oracle and operating-system patch sets.
Barcode Generator In None
Using Barcode creator for Font Control to generate, create Barcode image in Font applications.
www.OnBarcode.com
Encoding PDF417 In None
Using Barcode encoder for Font Control to generate, create PDF 417 image in Font applications.
www.OnBarcode.com
Checkpoint Completed
Draw GS1 128 In None
Using Barcode creation for Font Control to generate, create USS-128 image in Font applications.
www.OnBarcode.com
Painting Universal Product Code Version A In None
Using Barcode generator for Font Control to generate, create UPC Symbol image in Font applications.
www.OnBarcode.com
The CHECKPOINT COMPLETED wait event means that a session is waiting for a checkpoint to complete. This could happen when you re shutting the database down or during normal checkpoints.
ANSI/AIM Code 39 Encoder In None
Using Barcode creation for Font Control to generate, create Code 3 of 9 image in Font applications.
www.OnBarcode.com
USPS PLANET Barcode Generation In None
Using Barcode generation for Font Control to generate, create Planet image in Font applications.
www.OnBarcode.com
Db File Scattered Read
Code 3/9 Maker In Java
Using Barcode maker for Java Control to generate, create Code 3/9 image in Java applications.
www.OnBarcode.com
Code 39 Extended Generator In Objective-C
Using Barcode printer for iPad Control to generate, create USS Code 39 image in iPad applications.
www.OnBarcode.com
The db file scattered read wait event indicates that full table scans (or index fast full scans) are occurring in the database. The initialization parameter DB_FILE_MULTIBLOCK_READ_COUNT sets the number of blocks read at one time by Oracle. The database will automatically tune this parameter if you don t set any value for it in your parameter file. Although Oracle reads data in multiblock chunks, it scatters the data into noncontiguous cache buffers. If you don t have many full table scans and if they mainly consist of smaller tables, don t worry about it. However, if this event is showing up as an important wait event, you need to look at it as an I/ O-related problem the database isn t able to cope with an excessive request for physical I/Os. There are two possible solutions. You can either reduce the demand for physical I/Os or increase the capacity of the system to handle more I/Os. You can reduce the demand for physical I/O by drilling down further to see whether one of the following solutions will work. Raising the buffer cache component of the SGA would normally contribute to lowering physical I/Os. However, I m assuming that you re using Automatic Shared Memory Management by setting the SGA_TARGET initialization parameter, in which case your buffer cache is already optimally set by the database: Add missing indexes on key tables (unlikely in a production system). Optimize SQL statements if they aren t following an efficient execution plan. If you don t see any potential for reducing the demand for physical I/O, you re left with no choice but to increase the number of disks on your system. You also need to make sure you re reducing the hot spots in your system by carefully distributing the heavily hit tables and indexes across the available disks. You can identify the datafiles where the full table or index fast full scans are occurring with the help of a query using the V$FILESTAT view. In this view, two columns are of great use: phyrds: The number of physical reads done phyblkrd: The number of physical blocks read Obviously, the number of phyrds is equal to or close to the number of phyblkrds because almost all reads are single block reads. If the column phyrds shows a much smaller value than the phyblkrds
ECC200 Generator In None
Using Barcode creator for Software Control to generate, create ECC200 image in Software applications.
www.OnBarcode.com
GS1 - 13 Creation In Visual C#
Using Barcode maker for .NET framework Control to generate, create EAN13 image in .NET applications.
www.OnBarcode.com
CHAPTER 20 PERFOR MAN CE TUNING: TUNING THE INSTA NCE
UPC Symbol Reader In Java
Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
GTIN - 12 Maker In .NET Framework
Using Barcode encoder for VS .NET Control to generate, create UPC-A Supplement 2 image in .NET applications.
www.OnBarcode.com
column, Oracle is reading multiple blocks in one read a full table scan or an index fast full scan, for example. Here s a sample query on the V$FILESTAT view: SQL> SELECT file#, phyrds,phyblkrd 2 FROMV$FILESTAT 3* WHERE phyrds != phyblkrd; FILE# ---------1 7 15 16 SQL> PHYRDS -----4458 67923 28794 53849 PHYBLKRD -------36533 494433 378676 408981
Recognizing Code 128 In Visual C#
Using Barcode decoder for Visual Studio .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
Create Barcode In Java
Using Barcode encoder for BIRT Control to generate, create Barcode image in BIRT applications.
www.OnBarcode.com
Barcode Creator In Java
Using Barcode printer for Android Control to generate, create Barcode image in Android applications.
www.OnBarcode.com
Creating Barcode In VS .NET
Using Barcode creation for Visual Studio .NET Control to generate, create Barcode image in VS .NET applications.
www.OnBarcode.com
Generate QR Code In None
Using Barcode printer for Software Control to generate, create Quick Response Code image in Software applications.
www.OnBarcode.com
Barcode Recognizer In Java
Using Barcode decoder for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
Copyright © OnBarcode.com . All rights reserved.