Skip to main content

We can monitor transaction log files for Oracle in AWS RDS

Retrieving Archived Redo Logs
If you are using Oracle Database 11.2.0.2.v7 or later, you can retain archived redo logs and use log miner (DBMS_LOGMNR) to retrieve log information.
For example, the following command retains redo logs for 24 hours:
exec rdsadmin.rdsadmin_util.set_configuration('archivelog retention hours',24);                       
                    
Because these logs are retained on your DB instance, you need to ensure that you have enough storage available on your instance to accommodate the log files. To see how much space you have used in the last "X" hours, use the following query, replacing "X" with the number of hours.
select sum(blocks * block_size) bytes from v$archived_log where next_time>=sysdate-X/24 and dest_id=1;                          
                    
Once you have retained the redo logs, you can use log miner as described in the Oracle documentation.
Previous Methods for Accessing Alert Logs and Listener Logs
You can view the alert and listener logs using the Amazon RDS console. You can also use the following methods to access these logs:
To access the alert log, use the following command:
select message_text from alertlog;
To access the listener log, use the following command:
select message_text from listenerlog;
Note

Oracle rotates the alert and listener logs when they exceed 10MB, at which point they will be unavailable from the Amazon RDS views.

Source: http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_LogAccess.Concepts.Oracle.html
Labels:

Comments

Post a Comment

Popular posts from this blog

What is Tensor Parallelism and relationship between Buffer and GPU

  Tensor Parallelism in GPU Tensor parallelism is a technique used to distribute the computation of large tensor operations across multiple GPUs or multiple cores within a GPU .   It is an essential method for improving the performance and scalability of deep learning models, particularly when dealing with very large models that cannot fit into the memory of a single GPU. Key Concepts Tensor Operations : Tensors are multidimensional arrays used extensively in deep learning. Common tensor operations include matrix multiplication, convolution, and element-wise operations. Parallelism : Parallelism involves dividing a task into smaller sub-tasks that can be executed simultaneously. This approach leverages the parallel processing capabilities of GPUs to speed up computations. How Tensor Parallelism Works Splitting Tensors : The core idea of tensor parallelism is to split large tensors into smaller chunks that can be processed in parallel. Each chunk is assigned to a different GP...
Post a Comment
Read more

Data Wrangling vs EDA

  Aspect Data Wrangling (Data Preprocessing) Exploratory Data Analysis (EDA) Objective Prepare raw data for modeling by cleaning, transforming, and formatting it appropriately. Explore and understand the data to gain insights, identify patterns, and make decisions on data handling and modeling. Order Typically performed as a preliminary step before EDA. Usually conducted after data wrangling to further investigate data characteristics. Data Handling Focuses on data cleaning, filling missing values, encoding categorical variables, and scaling features. Involves data visualization, statistical analysis, and summary statistics to uncover patterns, relationships, and anomalies. Techniques Techniques include imputation, outlier detection, feature scaling, and one-hot encoding. Techniques include histograms, scatter plots, box plots, correlation matrices, and descriptive statistics. Data Transformation Involves structural changes to the dataset, such as feature engineering, data normaliz...
Post a Comment
Read more

What's replicated, what's not?

Logged operations are replicated. These include, but are not limited to: DDL DML Create/alter table space Create/alter storage group Create/alter buffer pool XML data. Logged LOBs Not logged operations are not replicated. These include, but are not limited to: Database configuration parameters (this allows primary and standby databases to be configured differently). "Not logged initially" tables Not logged LOBs UDF (User Defined Function) libraries. UDF DDL is replicated. But the libraries used by UDF (such as C or Java libraries)  are not replicated, because they are not stored in the database. Users must manually copy the libraries to the standby. Note: You can use database configuration parameter  BLOCKNONLOGGED  to block not logged operations on the primary.
Post a Comment
Read more