This is quick post summarizing issues encountered while setting up ssh equivalence on EC2 instance. I was setting up RHEL7 EC2 instances and followed below procedure to setup ssh equivalence Generate rsa key-pair using ssh-keygen -t rsa on both hosts Copy the public keys to the remote server in authorized_keys file Modify file permission to…
Author: Amit Bansal
Experienced professional with 16 years of expertise in database technologies. In-depth knowledge of designing and implementation of Disaster Recovery / HA solutions, Database Migrations , performance tuning and creating technical solutions.
Skills: Oracle,MySQL, PostgreSQL, Aurora, AWS, Redshift, Hadoop (Cloudera) , Elasticsearch, Python
Querying RDS PostgreSQL logs using Amazon Athena
PostgreSQL logs contains useful information which can help in troubleshooting performance issues,auditing and performing historical analysis. Some of items which can be logged are listed below Client connection and disconnection messages Failed DB connection request Database sql statement errors Database Fatal Errors Auditing Information Database Lock history Long running queries and Query plan logging High…
Migrating Function based indexes from Oracle to PostgreSQL
In this post, I will share issue faced while working with function based index in PostgreSQL . I was performing database migration from Oracle to PostgreSQL and used AWS Schema Conversion Tool(SCT) for converting the database schema.AWS Schema conversion tool takes care of automatically converting schema from one database engine to other. You can get…
Update WordPress Installations to >4.7.2
This post is applicable for hosted wordpress installations where auto-updates are disabled. Yesterday, I noticed there was blog post “Hacked by Unknown” on Askdba blog. Post was written by White Hat Hacker who exploited the Content injection vulnerability in 4.7.0 and 4.7.1. This vulnerability allows any visitor (unauthorized user) to assume role to edit/create blog…
PROCESSED Messages not clearing from Oracle Queue
I was contacted by Dev team to look into Development database where Oracle queue size kept on increasing. As per them messages were not getting cleared.They were running count on Queue table and the count kept increasing. To find out exact cause I included the msg_state in the query and found out that there were…
12.1.0.2 PDB fails to come out of restricted mode
This one is a nasty bug 🙂 I was trying to setup Oracle PDB in a test environment for the first time and got stuck with ORA-01035 error [[email protected] ~]$ sqlplus hr/[email protected]//oracle11g:1522/engg SQL*Plus: Release 12.1.0.2.0 Production on Fri Jul 3 07:34:58 2015 Copyright (c) 1982, 2014, Oracle. All rights reserved. ERROR: ORA-01035: ORACLE only available to users…