Load-oriented oracle rac wait events

Load-oriented oracle RAC wait events : The load-oriented wait events indicate that a delay in processing has occurred in the GCS, which is usually caused by high load, CPU saturation and would have to be solved by additional CPUs, load-balancing, off loading processing to different times or a new cluster node. For the events mentioned, […]

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Message-Oriented Oracle RAC wait events

Message-Oriented Oracle RAC wait event The message-oriented wait event statistics indicate that no block was received because it was not cached in any instance. Instead, a global grant was given, enabling the requesting instance to read the block from disk or modify it. If the local instance is the resource master, the grant happens immediately.If […]

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Grouping Oracle Rac Wait Events

To determine the amount of work and cost related to inter-instance messaging and contention, examine block transfer rates, remote requests made by each transaction, the number and time waited for global cache events as described under The response time for cache fusion transfers is determined by the messaging and processing times imposed by the physical […]

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Block-Related Oracle Rac Wait Events – Part 2

An event can be anything that Oracle has to perform on behalf of a set of instructions sent by the user interface. The term “wait” is used because every time a user connects to your application, a resource is allocated to perform tasks on its behalf. The waiting comes when a session is waiting for […]

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Block-Related Oracle Rac Wait Events – Part 1

The block-related wait event statistics indicate that a block was received as either the result of a 2-way or a 3-way message, that is, the block was sent from either the resource master requiring 1 message and 1 transfer, or was forwarded to a third node from which it was sent, requiring 2 messages and […]

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Basic on Oracle RAC wait events

Analyzing and interpreting what causes sessions to wait is an important method to determine where time is spent. In Oracle RAC, the wait time is attributed to an event which reflects the exact outcome of a request. For example, when a session on an instance is looking for a block in the global cache, it […]

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Oracle Database Maximum Availability Certified Expert

Hi Readers Finally I’ve successfully achieved  Oracle Database Maximum Availability Certified Expert. It was almost more than 6 months that I’ve been preparing for this. To achieve this certification, we must complete ALL the three certifications: Oracle Database 12c Administrator Certified Professional Oracle Certified Expert, Oracle Database 12c: RAC and Grid Infrastructure Administration Oracle Certified Expert, Oracle Database […]

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Generic error(Failed Jdk Version Is Incompatible.Please Use A Jdk Version With Opatchauto)

While running the opatchauto command in oracle grid you may face the jdk version error as below. We are going to learn about the steps which we use to solve this issue. root # /crsapp/app/oracle/product/grid12c/OPatch/opatchauto apply /softdump/12C_GRIDSOFT/PATCH/22191349 -analyze -ocmrf /softdump/12C_GRIDSOFT/PATCH/grid.rsp  OPatch Automation Tool Copyright (c)2014, Oracle Corporation. All rights reserved. OPatchauto Version : 12.1.0.1.10 OUI […]

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ASM (Sector Size Validations)

From the technical background, we have an idea of Validations. I talk about normal life we notice that we have lots of Validations in our life. Let’s have look at today about ASM (Sector Size Validations). First few lines will explain the technical definition of  Validations. Validation is the name given to the process whereby the information entered […]

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How To Change RAC Database Name

This article explains the steps which DBA must use to Change RAC Database Name. Before we must start the steps to change database name. Every DBA must know the condition in which have to change the name of a database.  When cloning the database on the same server. When we need to refresh the data.  […]

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