barcode in crystal report MANAGING AND MONITORING THE OPERATIONAL DATABASE in Font

Generate Denso QR Bar Code in Font MANAGING AND MONITORING THE OPERATIONAL DATABASE

CHAPTER 18 MANAGING AND MONITORING THE OPERATIONAL DATABASE
QR Code Drawer In None
Using Barcode generator for Font Control to generate, create Quick Response Code image in Font applications.
www.OnBarcode.com
Generate EAN-13 In None
Using Barcode encoder for Font Control to generate, create UPC - 13 image in Font applications.
www.OnBarcode.com
Database Metrics
GTIN - 128 Drawer In None
Using Barcode generation for Font Control to generate, create UCC-128 image in Font applications.
www.OnBarcode.com
Data Matrix Drawer In None
Using Barcode encoder for Font Control to generate, create DataMatrix image in Font applications.
www.OnBarcode.com
Database metrics, statistics that measure the rate of change in a cumulative performance statistic, are also important Oracle performance statistics. In previous Oracle versions, you needed to collect data at various periods to calculate the rate of change of various statistics. Now, Oracle places precomputed metrics at your fingertips. For example, you may be interested in a metric like the number of transactions per second during peak times. Dynamic performance views hold these metrics, and the AWR can also store them in its repository. You can consider statistics such as the number of user transactions and the number of physical reads in the system as the base statistics from which database metrics are derived. The MMON (Manageability Monitor) background process updates metric data on a minute-by-minute basis after collecting the necessary base statistics. All the Oracle management advisors use database metrics for diagnosing performance problems and making tuning recommendations. Database metrics can be used to check the health of various resources like the CPU, memory, and I/O. The OEM Database Control s All Metrics page, shown in Figure 18-1, offers an excellent way to view metrics. To access this page, start at the Database Control home page and click All Metrics under the Related Links heading. For details about the metrics, click the Expand All link in the left corner of the page. From here, you can drill down to the details of any metric by simply clicking on a specific metric.
Encoding QR Code 2d Barcode In None
Using Barcode drawer for Font Control to generate, create QR image in Font applications.
www.OnBarcode.com
Print Code39 In None
Using Barcode generation for Font Control to generate, create Code-39 image in Font applications.
www.OnBarcode.com
Figure 18-1. The All Metrics page of Database Control Oracle Database 10g uses several metric groups, with each group representing items like a wait event, service, or session. Table 18-1 lists the basic metric groups in Oracle Database 10g. You can view the Oracle metrics in two ways: by using V$ dynamic views, you can view the inmemory metrics; by using the DBA_HIST* views, you can view the metrics that are stored by the AWR. I explain these two types of views in the following sections.
Creating PDF 417 In None
Using Barcode creator for Font Control to generate, create PDF-417 2d barcode image in Font applications.
www.OnBarcode.com
Generate MSI Plessey In None
Using Barcode drawer for Font Control to generate, create MSI Plessey image in Font applications.
www.OnBarcode.com
CHAPTER 18 MANAGING AND MONITORING THE OPERATIONAL DATABASE
QR Code Creation In Objective-C
Using Barcode maker for iPad Control to generate, create Denso QR Bar Code image in iPad applications.
www.OnBarcode.com
Drawing QR-Code In Java
Using Barcode creator for Java Control to generate, create QR-Code image in Java applications.
www.OnBarcode.com
Table 18-1. Oracle Database 10g Metric Groups
UCC.EAN - 128 Creator In None
Using Barcode maker for Office Word Control to generate, create USS-128 image in Office Word applications.
www.OnBarcode.com
Scanning Code-128 In .NET
Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
Metric
ANSI/AIM Code 39 Decoder In None
Using Barcode recognizer for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
Creating PDF-417 2d Barcode In Java
Using Barcode generator for BIRT Control to generate, create PDF417 image in BIRT applications.
www.OnBarcode.com
Event class metrics Event metrics File metrics long duration Service metrics Session metrics short duration System metrics long duration Tablespace metrics long duration
Data Matrix ECC200 Scanner In Visual C#
Using Barcode decoder for Visual Studio .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
Barcode Creator In Visual Studio .NET
Using Barcode generator for .NET framework Control to generate, create Barcode image in .NET applications.
www.OnBarcode.com
Description
Barcode Recognizer In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
UCC.EAN - 128 Scanner In VB.NET
Using Barcode decoder for VS .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
Metrics collected at the wait event class level, such as DB_TIME_WAITING Metrics collected on various wait events Metrics collected at the file level, such as AVERAGE_FILE_WRITE_TIME Metrics collected at the service level, such as CPU_TIME_PER_CALL Metrics collected at the session level, such as BLOCKED_USERS Metrics collected at the system level Metrics collected at the tablespace level, such as TABLESPACE_PCT_FULL
Scan UPCA In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
Draw Matrix Barcode In C#.NET
Using Barcode encoder for Visual Studio .NET Control to generate, create Matrix image in .NET framework applications.
www.OnBarcode.com
In-Memory Metrics
The MMON background process collects database metrics and saves them in the SGA for one hour. You can view system-related metrics by using views like V$SYSMETRIC_HISTORY and V$SYSMETRIC. Here are some of the system metrics maintained in the V$SYSMETRIC view: Buffer cache hit ratio CPU usage per second Database CPU time ratio Database wait time ratio Disk sort per second Hard parse count per second Host CPU utilization percent Library cache hit ratio SQL service response time Shared pool free percent The V$SERVICEMETRIC and V$SERVICEMETRIC_HISTORY views provide details about servicelevel metrics. V$SERVICEMETRIC shows metric values measured on the most recent time interval for database services, in five-second and one-minute intervals, and V$SERVICEMETRIC_HISTORY gives the recent history of the metric values measured in five-second and one-minute intervals for the services running inside the database.
Saved Metrics
Using the AWR snapshots, Oracle saves the metric information that is being continuously placed in the SGA by the MMON process. After saving performance metrics in memory for an hour, the MMON process flushes metric data from the SGA to disk, where they are stored permanently in the DBA_HIST_* views, such as DBA_HIST_SUMMARY_HISTORY, DBA_HIST_SYSMETRIC_HISTORY, and DBA_HIST_METRICNAME. Each of these views actually represents snapshots of the corresponding V$ view, with, for example, the DBA_HIST_SYSMETRIC_HISTORY view containing snapshots of the V$SYSMETRIC_HISTORY view.
Copyright © OnBarcode.com . All rights reserved.