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Author: SysAdminXpert

When to switch to a bigger RDS instance

In this Blog, we explain when to switch to a bigger RDS instance or upgrade RDS Instance type in AWS, You need to know what differences therein configuration between my.cnf and RDS DB-Parameter.  All default MySQL settings that would normally be written in my.cnf. All values are the same in RDS with the exception of two which are mention below: ·         max_connections ·         innodb_buffer_pool_size Amazon set the following values based on server model: If your CPU is averaging > 70% or so, you might want to start planning on an upgrade. Before Upgrading your Box, ensure checkpoints: |-> Ensure how...

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Change ulimit values permanently for a user or all user in Linux

In this blog we explained how to Change ulimit values permanently for a user or all user in Linux. The ulimit is a mechanism for restrict the amount of various resources a process can consume. There’s a shell command to set the ulimit for processes which are started in that shell. It will provide control over the resources a user or a process in a shell can use.  You can list the current setting of ulimit values by login as your user and type the following commands # ulimit –Hn 4096 # ulimit –Sn 1024 Default values should be...

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What is AWS EC2 and its Benefits

In this blog, we explained what is AWS EC2 and its benefits. An EC2 instance is nothing but a virtual server in Amazon Web services terminology. It stands for Elastic Compute Cloud. It is a web service where an AWS subscriber can request and provision a compute server in AWS cloud.   Amazon EC2 reduces the time required to obtain and boot new server instances to minutes, allowing you to quickly scale capacity, both up and down, as your computing requirements change.    Amazon EC2 Benefits Elastic Web-Scale Computing: EC2  enables you to increase or decrease capacity within minutes, not hours or days....

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How to Convert EC2 Instance PV to HVM Virtualization Type

In this Blog, we explain how to Convert EC2 Instance PV to HVM Virtualization Type. Scenario: Convert t1.micro to t2.micro instance type conversion As t1.micro is PV (Paravirtual) machine and t2.micro is HVM (Hardware-assisted Virtual Machine) Note: please take a backup before performing the conversion. Steps before converting from PV to HVM: Go to the AWS Console and launch a new HVM instance (Amazon 64-bit Linux AMI, t2.micro). Stop the PV instance. Take a snapshot of the root device and create a new volume (SOURCE VOLUME) from this snapshot. Stop the HVM instance. Take a snapshot of the root...

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Alter on Big Table in RDS Solution to table full Error

In this Blog, we gave the solution to Alter on Big Table in RDS Solution to table full Error. Summary: Tables which are very big in size (~> 100GB to 600GB). Doing alter on such big tables is HIGH memory and CPU intensive task. when you try to alter query on one of the tables it gave “ERROR 1114 (HY000): table full” error… Why this issue occurred even though Amazon Aurora storage volume will automatically grow upto 64TB. ?   First, we will understand the storage in RDS Aurora.   There are 2 types of storage in Aurora. Instance store which...

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