LAMP – Kaizen – Continuous Improvement
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Category: LAMP

SQL Server Performance Queries

SQL Server Performance Tuning   — Top 10 sessions caused blocking SELECT TOP 10 r.session_id, r.plan_handle, r.sql_handle, r.request_id, r.start_time, r.status, r.command, r.database_id, r.user_id, r.wait_type, r.wait_time, r.last_wait_type, r.wait_resource, r.total_elapsed_time, r.cpu_time, r.transaction_isolation_level, r.row_count, st.text FROM sys.dm_exec_requests r CROSS APPLY sys.dm_exec_sql_text(r.sql_handle) AS st

Stored Procedure Error Logging

Stored Procedure Error Logging Create table to capture Errors Create Stored Procedure to Log Error Invoke Stored Procedure in TRY/CATCH Block USE TEMPDB; GO IF OBJECT_ID(‘APM.ErrorLog’) IS NOT NULL DROP TABLE APM.ErrorLog; GO CREATE TABLE APM.ErrorLog ( ErrorLogID INT IDENTITY(1,

Install and Run SQL Server Docker Container on Mac

Install and Run SQL Server Docker Container on Mac Like most people, I use Mac , Windows as well Linux OS for development and testing purposes. Primarily I use Mac for Development purpose. I have few projects which uses SQL Server as

Bulk Load Data Files in S3 Bucket into Aurora RDS

Bulk Load Data Files in S3 Bucket into Aurora RDS  We typically get data feeds from our clients ( usually about  ~ 5 – 20 GB) worth of data. We download these data files to our lab environment and use shell

MYSQL / AURORA Database Troubleshooting

Number of Connections by Host  SELECT SUBSTRING(HOST, 1, 10) , DB,USER , COUNT(*) AS Count FROM information_schema.processlist group by SUBSTRING(HOST, 0, 10) , DB,USER ORDER BY Count desc ; — ‘’, ‘Portal’, ‘webguest-dev’, ’46’ Aurora Max Connections select AURORA_VERSION(); select

Memory-Optimized Tables

Monitor Memory Optimized Table Space Usage : ; WITH system_allocated_memory ( system_allocated_memory_in_mb ) AS ( SELECT ISNULL(( SELECT CONVERT(DECIMAL(18, 2), ( SUM(TMS.memory_allocated_for_table_kb) + SUM(TMS.memory_allocated_for_indexes_kb) ) / 1024.00) FROM [sys].[dm_db_xtp_table_memory_stats] TMS WHERE TMS.object_id <= 0 ), 0.00) ), table_index_memory ( table_used_memory_in_mb,

Brute force attack on SQL Server

Brute force attack on SQL Server  If your business needs the SQL Server to be accessible on public network, you may be very vulnerable for brute force attacks. Following query will help you identify the failed login attempts and you

SQL Injection attack on Website hosted on EC2 Machine

SQL Injection attack on Website hosted on EC2 Machine: I setup a website with publicly available dataset. As soon as I launched website, numerous trolls and automated bots sending traffic to identify the vulnerabilities. Safe-Guards I have taken so far :

Install SQL Server Docker Container on Linux

Install SQL Server Docker Container on Linux and Connect through Client Tools I was surprised by ability to run setup and run SQL Server Docker container. It only takes about 2 commands and 2 Minutes. $docker pull microsoft/mssql-server-linux $docker run -e

AWS Data Pipeline & Load S3 File Into MySQL

Getting started with AWS Data Pipeline AWS Data Pipeline is a web service that you can use to automate the movement and transformation of data. With AWS Data Pipeline, you can define data-driven workflows, so that tasks can be dependent on

AWS Regions and Availability Zones

AWS  Regions and Availability Zones C:\Users\Raju>AWS ec2 describe-regions C:\Users\Raju> aws ec2 describe-availability-zones EC2 Regions and US-WEST-2 Availability Zones References:

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Restrict S3 bucket Access to VPC

Allow access to S3 bucket only from VPC Currently I am evaluating options to lockdown permissions to my S3 Buckets as part of Security Enhancements. These are the steps I followed to lock down S3 Bucket access only to my

How to become DBA favorite Developer

Application Name : When a connection is made to SQL Server there are by default no way for SQL Server to know what software is making the connection. If several apps are using a shared SQL Server and there are

AWS SLA Summary

AWS SLA Summary SLA Percentages Useful Links Cloud Provider Service Availability  

AWS RDS First Touch Penalty

AWS RDS First Touch Penalty According to AWS Documentation The first time a DB instance is started and accesses an area of disk for the first time, the process can take longer than all subsequent accesses to the same disk

Useful Free Tools and Books

Useful Free Tools Download Links Wonderful Microsoft utilities PerfMon , Profiler ,  Dynamic Management Views and System Tables should provide lot of insights and help in diagnosing and troubleshooting issues. These free tools are nice add-ons and improves the productivity.  Download

AWS RDS API Reference

AWS RDS API Reference Some of the RDS API command usuage . Editable parameters list for SQL Server. AWS RDS Options Group  aws rds  describe-option-group-options –engine-name sqlserver-se AWS RDS SQLServer SE 12.0 Parameter Groups aws rds describe-db-parameters –db-parameter-group-name default.sqlserver-se-12.0 AWS RDS

Remote Host Identification SSH Error

Remote Host Identification SSH Error Rajus-MBP:.ssh Raju$ ssh -i Key.pem ec2-user@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Someone could be eavesdropping on you right now (man-in-the-middle attack)!

AWS SQL Server RDS Native Backup Restore

Steps to Restore .bak SQL Server backup file to Amazon SQL Server RDS
Step by Step Guide to backup and restore SQL Server backups on AWS RDS through S3 Buckets.

Launching AWS SQL Server RDS

Learning from Launching AWS SQL Server RDS
We are evaluating options to migrate our read/write heavy production SQL Server database to amazon SQL Server RDS. We have pretty high throughput needs for few hours a day for few months in a year ,which is mission critical for our business success. We are evaluating pros and cons of moving to amazon RDS with provisioned IOPS. Current hosted provider doesn’t offer on-demand scaling solution .