Ubuntu is a desktop and server operating system based on Debian GNU/Linux. Note that http://askubuntu.com is specifically dedicated to Ubuntu questions.

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pgpool replication not allowing md5 authentication

I have installed both pgpool and postgresql via apt. In pgpool.conf, I have made the changes necessary to use replication mode, as well as my two postgresql databases (currently all running on the ...
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2answers
21 views

cannot access my DB server on ubuntu

server OS: Ubuntu 14.04 MYSQL Server version: 5.5.43-0ubuntu The output of: select User, host from user is: db % db localhost In my /etc/mysql/my.cnf, I made sure that bind-address is ...
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2answers
53 views

Slow database drop in mysql

Just installed a new 24 core server and it is noticeably slower when doing truncates and drops. Example: $ mysql -u root lmcdental_test2 Reading table information for completion of table and column ...
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1answer
40 views

How can I remove references to tables after removing .frm files?

So I had a bunch of csv files in my /var/lib/mysql/imports directory for importing into mysql tables I had created. To clean up the folder I deleted all the files in the directory (incorrectly ...
1
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1answer
194 views

MongoDB installation Ubuntu 12.04 LTS errors

I need some help with my MongoDB installation on a clean, fresh Ubuntu 12.04 LTS server with no nonsense installed. I thought it would be a piece of cake, but I got some errors and the Ubuntu-forums ...
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1answer
32 views

sqlplus not connecting to Oracle XE 11g

I installed Oracle XE 11g on my Ubuntu in vmware fusion. The oracle installation is all went fine but I am not able to connect the oracle database using sqlplus. I am getting this exception: $ ...
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1answer
45 views

MySQL on Ubuntu consuming almost all RAM

I've been having an issue with MySQL crashing randomly, apparently as a result of not having enough available memory (as discussed here: ...
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1answer
35 views

Ubuntu broken need to recover mysql db

With a recent Ubuntu upgrade it has broken my system. I now only have access to the filesystem through a live CD. I had a MySQL database on the system with many objects and views I would hate to lose. ...
0
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1answer
113 views

ubuntu - Pm2 mysql high cpu usage

Not sure what is going on here but would love some help if any can. I am running on digital ocean 1GB ram ubuntu server a node.js application that is is launched with pm2 and that uses a mysql ...
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1answer
4k views

oracle 11gR2 installation on ubuntu 14.04 LTS

I have installed oracle 11gR2 on ubuntu 14.04 LTS. On terminal I wrote following to start oracle: sudo service oracle-xe start on pressing enter, got following output : " Starting Oracle Net ...
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1answer
329 views

Mysql can't write to filesystem

I need to output some queries as csv files. The directory is in the webroot and I want it to be writable by apache too, so I'm trying to add mysql to the www-data group (on Ubuntu). I thought this ...
-2
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1answer
131 views

MySQL ran out of space, now won't start

So the partition MySQL was mounted on ran out of space. As a quick fix, I decided to move mysql's data directory to /home/minecraft/mysql/. I then changed the datadir in the config to the correcy ...
2
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0answers
2k views

Setting password for 9.3 PostgreSQL server

I currently have a 9.3 server running (on Ubuntu 14.04) with "trust" set as the authentification method in pg_hba.conf. How can I set the password again. In pgadmin the server currently doesn't allow ...
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0answers
882 views

PostgreSQL problems on Ubuntu 12.04

I'm having terrible problems with PostgreSQL initialization on my VPS. I followed several tutorials on this topic and nothing made my database server work. I followed these steps: sudo apt-get ...
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0answers
45 views

Can I export a PostgreSQL database from Heroku and Import as a PostGIS database in Digital Ocean?

Disclaimer: This may be a dumb question. This is honestly way over my head... one of the pitfalls of using Heroku for too long. I have a PostgreSQL database on Heroku. Now I'm migrating to Digital ...
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0answers
49 views

MySQL Memory & max_connections Performance Tuning

So, our site runs WordPress and in the past few days we have been getting tons of spam comments etc. I believe that we are becoming the victims of some kind of bot army that has been crashing our ...
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0answers
189 views

how do I debug postgresql 9.1 server terminating

my /var/log/postgresql/postgresql-9.1-main.log shows 2014-03-25 10:39:30 CET HINT: In a moment you should be able to reconnect to the database and repeat your command. 2014-03-25 10:39:30 CET LOG: ...
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0answers
60 views

Pg_restore table size differences

What would account for the difference in table sizes between one PostgreSQL database and another restored from its dump file? On an Ubuntu 12.04 host, I'm running PostgreSQL 9.1, and I dumped my ...
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0answers
88 views

MySQL replication backup

How to take MySQL Master-Master and Master-Slave replication backup?. I have setup Master-Master replication with a separate slave for each master on Ubuntu. What happens if, I issue or schedule ...
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0answers
814 views

Why can I not start mysql server on ubuntu after change the innodb_flush_log_at_trx_commit value to be 2?

Why can I not start mysql server on ubuntu after change the innodb_flush_log_at_trx_commit value to be 2 ? updated to answer the 3 questions: mysql> show variables like 'version%'; ...
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0answers
133 views

Mongodb 3.0.1 in ubuntu starts but status, stop or restart show 'mongo stop/waiting'

I am relatively new to Mongo and have installed 3.0.1 on a Digital Ocean droplet (Ubuntu 14.04 LTS). The database starts without problems but I am unable to 'sudo service mongod [stop/restart/status]' ...
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0answers
50 views

what is the password to user mongodb when mongodb is installed in ubuntu?

When I installed mongodb in ubuntu, user mongodb and group mongodb are created in /etc/passwd and /etc/group. But I have no idea of the password to these user and group. I have to run mongod as root ...
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0answers
23 views

How do I alter my role to be a superuser?

I'm working my way through the steps in this slide to configure Postgresql & PostGIS. I configured my user role as directed on this slide. Note, the new role should not be a superuser. That ...
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0answers
24 views

MySQL by default autostarts on Ubuntu Linux?

I installed MySQL server on Ubuntu Linux 14.04 LTS following instructions at https://www.digitalocean.com/community/tutorials/how-to-install-linux-apache-mysql-php-lamp-stack-on-ubuntu. The console ...
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0answers
167 views

Galera: WSREP: gcs connect failed: Socket type not supported

I am having a problem when trying to start the 2nd and 3th nodes. The node number 1 has started ok with no problem: I use the same configuration file for galena.cnf and my.cnf : change the ...
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0answers
21 views

Should I install hadoop on a single node

I just bought a desktop computer with 16GB RAM and 1TB drive, i7-quad core. I will be partitioning off 800GB for Ubuntu so I can do some data science type tasks. Is there any advantage to installing ...
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0answers
143 views

Are A or D series VMs better for deploying PostgreSQL on Azure?

In Azure there are VMs that have local storage either as spinning disk (A-series) or SSD (D-series). Considering this space is wiped on reboot... Is there a benefit to choosing the SSD option for ...
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0answers
65 views

MySQL performance_schema not working properly?

I have MySQL 5.6.19 community server running on my Ubuntu 14.04. Lately I have been trying to monitor MySQL server using performance_schema. Previously I used to do this by running SHOW FULL ...
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0answers
86 views

Pre requirements missing when installing oracle database 11g Ubuntu

I'm trying to install Oracle Database 11g on Ubuntu 14.04. At the middle of executing ./runInstaller I'm getting following message saying about missing prerequisites. This says make is missing but, ...
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0answers
45 views

mysqldump replace option - ubuntu / mediawiki

I know this is probably a silly question, but I'd like to be sure, rather than make assumptions. There's the option to use 'replace' in a mysqldump, which uses the 'REPLACE' rather than the 'INSERT' ...
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0answers
134 views

MySQL 5.5, Xubuntu 14.04 - INSERT and UPDATE bottleneck

DBAs: I have been developing and maintaining plugins for Moodle for the last ~2 years, and have recently decided to try using my local desktop again, rather than my institutions ESX VMs, as a ...
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0answers
58 views

Starting up postgres on Ubuntu for the first time

I've installed postgres on ubuntu, created a node and now I'm trying to start up that node as per the instructions: postgres --coordinator -D /usr/local/pgsql/data -p 1281 But I get the following ...
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0answers
307 views

mysql service failed to start when datadir changein ubuntu

I have dual Operating system on PC, windows 8 and ubuntu 14.0, and I am mostely using ubuntu because my MySql database is hosted on ubuntu. Recently when I am trying to restore my database, which is ...
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0answers
589 views

huge size of /var/lib/postgresql/9.3/main/base/1 directory (postgresql)

i'm using postgresql 9.3.4 and real size of database is about 5.5 GB but POSTGRESQL fill disk about 256 GB !! is this POSTGRESQL Cache and what is method to clean thing issue ?
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0answers
117 views

listen_addresses set to '*' in postgresql.conf disappears every reboot of Ubuntu

I have set listen_addresses to '*' in /etc/postgresql/9.1/main/postgresql.conf and stopped/started Postgres 9.1 with /etc/init.d/postgresql to "reload" configs. This works fine and I can access my ...
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0answers
632 views

TokuDB fails to load in MariaDB, even when transparent hugepages are disabled

Earlier, I upgraded my website server to Ubuntu 14.04 LTS. I had a very nice setup with MariaDB and the TokuDB engine. However, the setup was kind of messed up when TokuDB refused to load properly, ...
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0answers
49 views

Connecting to a remote Postgres 9.1 DB

I am running Postgres 9.1 on Ubuntu. I have host all all my.ip.address/32 md5 set in pg_hba.conf and listen_addresses= '*' set in postgresql.conf. Running show listen_addresses shows '*' Running sudo ...
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0answers
25 views

Connecting mysql on server A/ to webapp on server B/

I am connecting mysql on server A/ to a webapp located on server B/. Both servers are Ubuntu servers. For security purposes, is there any way on server B to avoid showing the full path / IP address ...
0
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0answers
97 views

MySQL overtaking system memory and forced to restart

I'm facing a frustrating issue. I have a MySQL Server 5.5 running on top of Ubuntu Server 12.04.3 LTS (VMWare guest w/ 16GB RAM - 8 Cores) mysqltuner.pl says [OK] Maximum possible memory usage: ...