Amazon Relational Database Service is a web service that makes it easy to set up, operate, and scale a relational database in the cloud.

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1k views

How to speed up select distinct?

I have a simple select distinct on some time series data: SELECT DISTINCT user_id FROM events WHERE project_id = 6 AND time > '2015-01-11 8:00:00' AND time < '2015-02-10 8:00:00'; And it ...
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0answers
32 views

Does creating an empty table in MySql have any effect(downtime) on production?

Disclaimer: I am, in all probability, paranoid about pushing a patch on a production server. The patch alters the schema, by creating a new table (which is empty), and changes some stored procedures ...
3
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2answers
403 views

How to setup Oracle at Amazon RDS

I created a Relational Database Service (RDS) with Oracle database at Amazon Web Services (aws.amazon.com). However, when I attempt to connect to the database (with SQLDeveloper or Navicat), I am ...
3
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0answers
256 views

Optimizing a single table, write-once, read-many PostgreSQL database

I've just finished constructing a table of ~835 million rows using Google's ngram dataset, aggregated on the years in which they occurred so that each 2-,3-,4-, and 5-gram is represented by a single ...
2
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2answers
1k views

Why is Postgres on RDS maxing out on CPU every few hours?

Using Amazon RDS, we are running ETL scripts to migrate our data. However, every few hours there is a huge CPU spike. Here are the ETL specs (per ETL): 50 records inserted / second pool of 1000 ...
1
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1answer
2k views

Optimizing Amazon RDS - MySQLTuner Recommendations / Feedback & Suggestions

I'm currently trying to optimize a database I've inherited for speed. The server is an Amazon RDS db.m3.large instance: 2 VCPUs 7.5 GB Memory 500 GB HDD My current strategy is to do the following:...
0
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1answer
3k views

AWS RDS PostgreSQL dump/restore - syntax error

I am trying to import a postgresql database from an EC2 instance to RDS on the same subnet, so far I am doing the following... 1) Dump EC2 DB: pg_dump --host localhost --port 5432 -Fc --encoding='...
0
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1answer
375 views

Amazon RDS non superuser create function in C

I am asked to restore a Rails application to a postgresql RDS instance. There are many functions in C but looks like only superuser can create functions in C and I could not get superuser access on ...
2
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1answer
1k views

Amazon Redshift - The difference between Query Slots, Concurrency and Queues?

We are building a business intelligence system, and we have a huge PostgreSQL Database (DB) where we make all the info processing, and a Redshift Data Warehouse (DWH) where we store the data and ...
0
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1answer
456 views

How does Amazon create the RDS for Postgres? Some kind of Docker?

I am really curious about the infrastructure of Amazon. When I create a new instance of RDS, it gives me a host, username, password.. Everything. Behind the curtains, how do they do this? It´s some ...
4
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1answer
876 views

Monitoring Amazon RDS with pgtop

I recently migrated a Postgres database to Amazon RDS and I am lacking a good live monitoring tool. I tried pgtop, but I can't get it to work on Amazon. I can see the header with the DB statistics (...
0
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1answer
664 views

Select Count on Big table take 15 minutes

I try to run select Count on table with like 16M rows, with MySql 5.5 and workbench 6.2. The query running almost 1000sec . Is it normal? The query : SELECT COUNT(1) FROM My_Table when I run ...
1
vote
1answer
519 views

Is there a way to run mysqldumpslow against slow queries logged to a table?

AWS RDS by default logs slow queries to a database table. Is there a way to run mysqldumpslow against that table, without exporting it to a file first? Or is there a better way to get a report of ...
0
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1answer
113 views

Moving Local PostgreSQL 8.4.20 Database to Amazon EC2 or RDS

I'm running PostgresSQL 8.4.20 on a local server and plan to migrate the data to either Amazon EC2 or RDS. I have working knowledge of databases and need advice from experts. I've been researching ...
3
votes
3answers
962 views

Cannot ALTER TABLE

I have a particular table that I cannot add a key for: mysql> ALTER TABLE tasks ADD KEY `fruitful_user_count` (`user_id`, `is_fruitful`); ERROR 1034 (HY000): Incorrect key file for table 'tasks'; ...
2
votes
1answer
656 views

innodb_thread_concurrency vs slave_parallel_workers

I am new in rds, but I am facing server performance issue. I got these two variable but I am confused what exactly is difference between innodb_thread_concurrency and slave_parallel_workers.
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0answers
250 views

Problems with migration from Amazon RDS MySQL to MariaDB

We are trying to migrate from Amazon RDS MySQL to MariaDB for the performance benefits given by MariaDB. We have copied all the data from Amazon RDS MySQL to MariaDB and the database is up and ...
2
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2answers
602 views

Mysqldump throwing error 'Couldn't execute 'ROLLBACK TO SAVEPOINT sp':

Can any one please explain what is happening with our DB dumps? We are executing dump as below mysqldump -v --single-transaction --quick --lock-tables=false --skip-triggers -uXXX -pXXX $...
1
vote
1answer
75 views

optimizing query for slow queries

I have this query in my slowqueries table which essentially is taking about 5-8 seconds to complete the query time: SELECT s0_.id AS id0, s0_.updated AS updated1, s0_.created AS created2, ...
1
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1answer
1k views

How to migrate postgreSQL on EC2 instance to AWS RDS?

I have a large PostgreSQL DB (around 100GB) which is on EC2. I want to migrate it to RDS. How can I achieve this with minimal downtime?
1
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1answer
378 views

Amazon RDS replication with external slave

I've recently configured a replication with an external MySQL master and RDS as slave but now I need to reverse that config and use RDS as master and the other instance as slave. Actually I use a vpn ...
0
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0answers
307 views

Trying to connect to AWS RDS from an AWS EC2 instance

I am trying to connect to an AWS RDS instance from an AWS EC2 instance. I ssh into the AWS EC2 instance, and then issue the following command: mysql -h xxxxxx.ciy4oapkpytm.us-east-1.rds.amazonaws.com ...
0
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1answer
294 views

Amazon RDS freezes on mysqldump

My questions is quite similar to Mysqldump from the Amazon RDS. I have the same behavior. Everytime when I do a backup using mysqldump my entire RDS freezes and hence my application is not responding. ...
0
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1answer
268 views

too many connection error mysql: how to calculate max_connections

how to calculate this values to get the best results to resolve this error "too many connection error mysql" and make my API faster in mysql wait_timeout = ?? max_connections = ?? ...
1
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1answer
921 views

How to connect to an Amazon PostgreSQL database using SSL

I'm trying to log into an Amazon PostgreSQL DBS using SSL. I have all credentials but my psql version doesn't seem to support SSL. I've tried searching Postgres docs but all I see is how it has ...
3
votes
1answer
1k views

Create t2 instance and connect via Wokrbench

I've created an t2 RDS instance inside a VPC. The instance is set to Publicly avaiable: No. I wasn't able to connect to the instance using MySQL Workbench. Is there an option to connect to the ...
3
votes
1answer
263 views

IOPS on Amazon RDS

I'm very very new to AWS. Is one insert record operation on an Amazon RDS table counted as 1 IOP? I have a use-case of inserting about 1 million records every day, and would like the job to finish ...
0
votes
2answers
825 views

Replicated timestamp column in different timezone

I have the master running Mysql 5.5.38 on Ubuntu 14.04 LTS. The timezone in the master is UTC+5:30. The slave is in AWS RDS which runs in UTC. The slave is primarily used for running for SQL queries ...
4
votes
1answer
3k views

Why use RDS over EC2 for Postgres?

I have a database currently running on EC2. As I have to move it to a bigger machine the question of using RDS came up. Pricing: I can get an EC2 c3.large instance with two SSDs (16GB each), two ...
3
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5answers
3k views

Amazon: How to change database name in Amazon RDS MySQL?

I want to change MYSQL database name of the DB instance of Amazon RDS. How it can be possible?
2
votes
2answers
388 views

Is it safe to delete the innodb schema on a new Amazon RDS instance?

As per the title, I'm struggling to find out if it's safe to delete the innodb schema that's created on a fresh Amazon RDS instance. mysql> SHOW DATABASES; +--------------------+ | Database ...
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0answers
109 views

PostgreSQL: How can I identify the connections which is blocking ALTER TABLE?

I would like to add some fields to a table in all testing and production DBs, all of which are stored in PostgreSQL 9.3 on Amazon RDS. ALTER TABLE users DROP COLUMN IF EXISTS device_language; ALTER ...
3
votes
1answer
3k views

MySQL RDS Instance eating up memory and swapping

I have an issue with memory on a RDS instance which is of db.m2.4xlarge class. Below are the specifications of the RDS instance Instance Class: db.m2.4xlarge ( 68.4 GB of RAM ) Engine: ...
3
votes
2answers
4k views

Finding reason behind high write IOPS on MySQL (RDS) server

I am having performance issues with an AWS RDS instance (running MySQL 5.6). This is the backend db to an XMPP server called Tigase. According to Tigase Inc. this type of db instance should be able ...
1
vote
1answer
123 views

What does exec(text) do?

I just found the following function in two RDS PostgreSQL 9.3 DBs: -- -- Name: exec(text); Type: FUNCTION; Schema: public; Owner: adam -- CREATE FUNCTION exec(text) RETURNS text LANGUAGE plpgsql ...
1
vote
1answer
730 views

PostgreSQL 9.3: pg_dump fails due to tiger.direction_lookup

I am trying to dump the schema from one of my PostgreSQL 9.3+PostGIS databases: /usr/lib/postgresql/9.3/bin/pg_dump --schema-only -h stg-db.....rds.amazonaws.com ...
4
votes
1answer
2k views

Is there a way to replicate Postgres databases in Amazon RDS between regions?

We have a Postgres RDS instance in the AWS Oregon Region. For some supposed legal reasons, we have to host our client's European data in the Ireland AWS Region, but we need that data synchronized to ...
0
votes
1answer
2k views

Amazon RDS CPU Usage keep increasing without any long running process in Show Processlist

We are using Amazon RDS(db.m2.2xlarge), CPU usage is suddenly increasing gradually even after we reboot the DB Server. This is happening just past 2 days and we didn't give any new build recently. I ...
0
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2answers
70 views

Mysql replication with c

I have huge database on MySql and It's become more and more huge. So, Now I am facing performance issues with my database. Some of tables has millions of records in it. like my login detail table ...
0
votes
0answers
161 views

What's causing Postgres to freeze?

I'm using Amazon RDS to run my Postgres database, v9.3.3. Recently, I had 2 instances where updating the schema caused the database to stop responding and I had to restart it in order to put the site ...
0
votes
2answers
1k views

What is the best choice for MySQL high availability (zero downtime)? [closed]

As I know there are many solutions for MySQL HA, but most of them are congenitally not zero downtime solution, like MHA, AWS RDS... That said, if zero downtime is "must have", the only choice is ...
3
votes
1answer
1k views

Does amazon rds PostgreSQL require vacuum?

It isn't clear if auto vacuum is running in rds. Thanks!
0
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2answers
2k views

MySQL Community Edition Capacity

I am using MySQL Community Edition on Amazon RDS service. It is a very large database, 2/3 tables has about 10 millions records and 4-5 tables has 7-8 millions records. Questions How much capacity ...
4
votes
1answer
2k views

What is default MySQL binlog retention in AWS RDS?

I tried to retrieve my MySQL RDS binlogs in order to run manual "rollback" for some SQLs. Unfortunately, I noticed that only 2 binlogs for the last 30 minutes are available. "call mysql....
5
votes
1answer
3k views

Slower queries after upgrade from mysql-5.5 to mysql-5.6

There is lots written about how MySql 5.6 is faster than MySql 5.5 (e.g. http://dev.mysql.com/tech-resources/articles/mysql-5.6.html) but we upgraded our Amazon RDS instance (using the new upgrade ...
0
votes
1answer
440 views

Unable to migrate local database to RDS instance

I recently created an MySQL instance on Amazon RDS. Unfortunately, I'm not able to connect to the instance from the MySQL command line. I will brief you the details. 1) I want to move/migrate my ...
2
votes
1answer
7k views

Aborted connection (Got an error reading communication packets) MySQL on Amazon RDS

I'm getting the following warning in MySQL: Aborted connection (Got an error reading communication packets) I'm using Amazon RDS for MySQL hosting. Both MyISAM and InnoDB storage engines are ...
2
votes
0answers
165 views

Postgres: missing disk space after truncate and re-insert

We've got a IP address range dataset stored in a table that was truncated and then re-populated with a slightly modified version of the dataset (almost identical in size). However, after truncating ...
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3answers
5k views

How to decide whether to enable MySQL query cache using InnoDB

How should the decision to enable / disable the MySQL query cache be made, on a server that uses just InnoDB tables. Say for example, if the cache is enabled, then how should the output of: SHOW ...
2
votes
2answers
1k views

Amazon rds MySql -> concurrent connections deadlocks

I normally hang around in StackOverflow but I think this issue is better suited here. I've built an application in C#.NET that uses MySql as a database. My application inserts and updates data in the ...