Oracle Exadata Experts Handbook - [PDF] [EPUB] Oracle Exadata Experts Handbook Oracle. Exadata Expert's Handbook. This page. or we felt the scripts themselves were of.. X2: The third edition of Exadata, announced at Oracle Open Expert Oracle Database portal7.info As the title suggests, Expert Oracle Database Architecture concentrates on the database. Oracle Exadata Expert's Handbook Tariq Farooq Charles Kim Nitin .
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Oracle Exadata Experts HandBook - Download as PDF File .pdf), Text File .txt) or read online. Oracle Exadata Experts. The Practical, Authoritative, Degree Technical Guide to Oracle Exadata: From Setup to Administration, Optimization, Tuning, and Troubleshooting The. Exadata Monitoring Architecture. Oracle Exadata Plugins. Prerequisite Checks. Manual Deployment. Exadata Database Machine Discovery.
Oracle alert log monitoring script unix pl : Perl script for sending an email. Submitted on - Background processes periodically flush the data to the Automatic Workload Repository to capture a history of metric values. If any errors found in the log it will send and email. To run all of the Knowledge Scripts in the OracleRACUNIX category, your account must grant you SELECT permissions for all of the following Shell script for monitoring blocking sessions views Less than a minute 1 Below is the shell script, to be configured in crontab, which will send mail incase of blocking session observed in the database.
In addition there is Oracle's engineering effort in creating a powerful platform for both consolidation and transaction processing. The resulting value proposition in the form of Exadata has truly been a game-changer. Expert Oracle Exadata, 2nd Edition provides a look at the internals and how the combination of hardware and software that comprise Exadata actually work. They share their real-world experience gained through a great many Exadata implementations, possibly more than any other group of experts today.
Always their goal is toward helping you advance your career through success with Exadata in your own environment. This book is intended for readers who want to understand what makes the platform tick and for whom—"how" it does what it is does is as important as what it does. The answer is yes and it is pretty straight-forward to configure.
While many books cover the installation and configuration of Oracle on UNIX and Linux the Oracle professional is then set adrift in their new environment. Total Votes - 10 votes. However, some DBAs like me, do not have the luxury to use these tools.
If anyone can help I would Oracle's new ADR with command interface shows promise for database administrators who like to script their own solution for quickly scraping the alert log and automatically looking for errors.
I want to have a script that can run periodically to check the Data Guard health and send an email if it finds a problem. Outputs the entire alert logs from all current ADR homes, one after another. Last updated on February 23rd, at pm. Hi Guys, I am looking for a Alert log monitoring script if anyone has it can you please email it to me. Two files make up the custom script based monitoring solution. Log files are also generated when products are installed or deinstalled and when patches are applied.
LOG is a chronological log of messages and errors written out by an Oracle Database. The script can also be customised so as to email an alert notification if the standby and the primary go out of sync by say 5 log files.
Monitoring and Maintaining the Alert Log. Alert log message Alert - This script e-mails any important alert log messages that are found in the alert log. Packed with ready-to-use Oracle scripts, this is the definitive collection for every senior Oracle DBA.
Description In this article, i will explain how we can check our database alert. The below script will alert if any one of the following happens - a. This script assumes a four node RAC. No need to access the filesystem containing the actual alert log. With the recent release of the new Exadata X7, it is a good time to point out an important MOS note that provides details for the proper monitoring and managing of an Exadata environment via Oracle Enterprise Manager.
Drop me a line if you need that customisation script. To make a long story short I need a good log scan script. With decades of experience using Oracle monitoring scripts and Oracle tuning scripts, BC experts shares their secrets for navigating the Oracle data dictionary. Powershell script — processes the output; Powershell script — writes to the event log and optionally sends emails SCOM — raises alerts based on the event log records; Benefits.
Low free space in archived redo log directory Alert - If the archived redo log directory become full, our Oracle database will hang up. ManageEngine Applications Manager provides indepth Oracle Monitoring capability in addition to providing Oracle datafile monitoring. Oracle also provides a text-formatted version of the alert log for backward compatibility.
Since Analyze does not create a log I did not know the Analyze was blowing up. Grid Control can tell you, but its often not available in the environment. The script is still monitor the old file-descriptor I think? Is there a way to auto update file inode or something after a period of time for the tail command? The script can send notification using email.
Open the alert log file with less or more command and search for ORA- Oracle now want you to use adrci to manage the alert log and trace files.
The text version of the alert log file is still available in ADR Automatic Diagnostic Repository directory, but it exists for backward compatibility only. The Oracle Alert log tells us what major events have happened to the Oracle database. Key If no file name is given, the space available on all currently mounted file systems is shown. Below is a cronjob shell script i used in Solaris 10 to monitor the alertlog.
Since this is the first for our company, I need some help setting up the monitoring procedure. Thanks for your help in advance. Debugging shell script to monitor oracle alert log file 0 lines read in alert log file.
This file should constantly be monitored to detect unexpected messages and corruptions. Once again, the script can be made executable using the following command.
Querying Cell Alert History Best practices suggest periodically querying the alert history. The alert history notifications are categorized as Informal, Warning, or Critical. The activerequest, alertdefinition, and alerthistory commands display current and historical alert details. In order to display the alert history that occurred on the cell or a particular component, use one of the following commands: Battery Serial Number: Hardware alertType: Stateful beginTime: Disk write throughput might be temporarily lower during this time.
Note that many learn cycles do not require entering WriteThrough caching mode. An Overview of Exadata Storage Server 71 the learn cycle. When the disk controller cache returns to the normal WriteBack caching mode. IP address used. The battery learn cycle is a normal maintenance activity that occurs quarterly and runs for approximately 1 to 12 hours.
The flash drives are not affected. Such a request could overwhelm the storage server cache.
Exadata Storage Cells Storage Architecture and Formulation So far you have learned the fundamental concepts of cell architecture and cell management. While this is the most common setup there is. When it comes to Exadata. Before we jump in and start discussing the Exadata storage architecture and storage preparation. A traditional Oracle Database deployment requires three major components: The general-purpose network packets suffer other limitations.
So merely using the RDS protocol between database and cell servers over InfiniBand is superior to the normal deployment scenario. ASM offers dynamic load balancing and rebalancing of space when new disks are added or removed—something not possible with LVMs.
The initial two disks are mirrored using RAID mdadm and are used for the operating system. The df command on the cell shows the following file system structure. There are of course several key benefits of using ASM: Oracle generally recommends it for most new databases—and especially for RAC setups. Exadata Storage Server software binaries.
While ASM is an option in traditional database deployments. In order to know whether the LUN is the system partition or not. Approximately 29GB of space per disk is used for this purpose. The major difference between Flash Cache and Flash-based grid disks is quite simple. Once the cell disk is created. Flash Cache is autopilot caching of recently accessed database objects. The higher-performance grid disks across all cell servers then can be put together into a single disk group to place any hot data.
In contrast to other storage boxes. As standard practice. Exadata Storage Cells At the helm of the storage layer on a cell. For instance. A cell disk is created based on the existing LUN on the cell server.
The next setup is to configure the cell disk from the existing LUNs. For example. System Users for Cell Administration As mentioned in the beginning of the chapter. Flash Cache does offer the ability to manually pin database objects into it much like pinning objects into the SGA.
Used to shut down and start up the storage server. The commands for doing so are covered later in this chapter. Flash grid disks. Unlike root and celladmin. Following are a few practical examples. Here are the differences between the users and their capabilities: At times there will be database objects that you know will perform better if they are truly Flash based rather than contained on traditional disks and possibly Flash cached.
Listing Disk Levels To list all levels of disks. LUN size. RAID level. A physicalInsertTime: HardDisk enclosureDeviceId: System Users for Cell Administration diskType: Exadata Storage Cells freeSpace: The following example shows the contents of each file: This is usually run as part of the initial deployment. The cellinit. Each database server will have its own IP address recorded in the cellinit.
OS version. Exadata Storage Cells The cellinit. When the imageinfo utility is executed as the root user on the cell server as follows.
Managing the Cell Server Sometimes it becomes necessary. In this context. The script can also be downloaded. SupportTool folder. Possible The imagehistory utility helps you get all the previous software versions installed on the particular cell: Troubleshooting the Cell Server 83 Cell boot usb partition: To remove the old alerthistory on the cell. SunDiag The sundiag.
The utility is up and running upon system reboot. You have to execute the script as root user. This script generates a timestamped. The script helps you gather the required diagnostic information related to problematic disks or any other hardware issues on the cell. You can collect input at various levels: Following are some examples: Exadata Storage Cells from support. To obtain more information on the utilization of this utility use the —d option with the command.
This utility is used without passing any parameters. To get more help on how to use the utility. The Note and the. Storage Cell Startup and Shutdown 85 The second example extracts 2 hours starting with the time defined with the at parameter. Based on the limits set for space management.
It is strongly recommended that you include this script as part of your periodic maintenance operation tasks. The ExaWatcherCleanup module is used to automatically manage the file system space used by ExaWatcher. It is also used to validate the current configuration on the servers. That being said. You will have to adjust all the required disks on the cell.
Exadata Storage Cells to guarantee a graceful cell shutdown. As root. Once the cell is rebooted or comes online. This section emphasizes the significance of complying with an appropriate cell stop and start procedure and demonstrates the steps in depth. The default value is set to 3. If the result of asmdeactivationoutcome is yes for all the grid disks listed. Under any circumstances. OS command to shut down the cell server Note If you intend to take the cell down for a very long period of time.
One of the key responsibilities of a DMA includes graceful shutdown of the cell. Once you turn off all the grid disks on the cell.
Use the following command to verify the result: You can also refer to the OS file to find out when the cell restarted. First step of the procedure: When a disk confronts performance issues or any sort of hard failure.
At the same time. It is highly recommended that you review the logs frequently. Last step of the procedure: Solving Disk Problems 87 1. Although most of the procedure is automated by Oracle. Second step of the procedure: A hard failure is when a disk goes into critical state. The MS service on the cell then performs a set of confinement checks to determine if the disk needs to be dropped. ASM automatically brings related grid disks online as part of the Exadata auto disk management.
Exadata Storage Cells Initially. If the disk fails the performance tests. ASM automatically drops the related grid disks of the failed disk either normally or forcefully.
In turn. If the disk passes the tests successfully. You will have to either use the spare disk to replace the faulty disk or request a replacement disk from Oracle. All grid disks of the particular cell disk are taken offline.
Disk problems can be categorized in two levels: Whenever a disk failure occurs or a disk goes into predictive status. After the disk issues are addressed and the disks are ready to go active. When you have been notified about the critical failure state of a physical disk.
If ASR is configured. Typically the following actions are performed when disk issues are identified on the cell server: When poor performance is detected. If the disk passes the performance tests.
A predictive failure is when a disk is flagged as predictive or in a poor performance state. These control the storage access from ASM cluster or database clients. An Exadata cell server by default comes with open storage security. Enforcing Cell Security Exadata offers many layers of security setups to meet your business needs. Oracle Exadata supports two levels of security: ASM-scoped security and database-scoped security. Apart from open security. With ASM-scoped security.
To view the disk-related alert history. Three minutes after replacing the faulty physical disk on the cell. Enforcing Cell Security 89 cell alert history or by reviewing the cell logs. Security can control which ASM or database clients can access a specific grid disk or pools of grid disks on the cell.
You can go further and configure database-scoped security to restrict the storage access at the database level. If you want to change the realm name on the cell. Exadata Storage Cells Even if you intend to deploy database-scoped storage-level security. Restart the ASM and database instances. The following sections describe step-by-step procedures for how to enforce ASM-scoped and database-scoped security on the cell. This type of security enables grid disk access to all the database clients of that ASM instance.
Create a cellkey. Assign the security key to the ASM instances across all the cell servers where you want to enforce the security: You can list or view the existing security keys using the following command: Assign the security key to the database on all the cell servers: When you want to further restrict individual databases of that ASM instance to access a different pool of grid disks.
Stop ASM and databases. This chapter explained all the essentials and the importance of Exadata Storage Cells in detail. The following procedure can be used to remove the cell security: You have learned how to gracefully shut down Storage Cell background services.
If you want to also remove ASM-scoped security. You can bring down the database-scoped security to ASM-scoped security and ASM-scoped security to the default open security.
Remove the cellkey. Summary To manage any environment effectively. The previous steps exempt the databases from database-scoped security. Get the list of grid disk attributes assigned. Keep in mind that any change and enforcement require ASM and database downtime. See also Oracle Database 12c. See OEM 12c. Oracle Database 12c. Adaptive Plans. Configuration Requirements. See Data Guard. See CPUs central processing units.
RS Restart Server. See also imagehistory command. Index cache-type attribute options. See Grid disks. MS Management Server. Cell servers. See also MS Management Server. Cell monitoring. Certified Platinum Configuration.
LUNs logical unit numbers. See also Cloning. See Snapshots.