A widely-used open-source operating system that is particularly popular on servers.

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Why Can't I find my databases from Mysql on linux?

I'm new to linux. I cannot get a list of my databases by typing SHOW DATABASES on the MySQL shell. Though this MySQL program is aware of the MySQL datadir because it is listed when I type SHOW ...
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1answer
138 views

Postgres memory usage too low

I have a 400GB Postgres 9.3.4 DB running on Fedora20, and a few indices per table. I have upped shared buffers to 4GB (the system has 16GB available), set shm in the kernel and set the ...
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1answer
143 views

Using environment variables in data pump query

I have been trying to use data pump (expdp and impdp) in order to retrieve some data from a database to import it into another. I am using the expdp using the table and the query parameters in order ...
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0answers
26 views

MySQL/MariaDB CLI limits max password?

I've got strange problem - my MariaDB instance CLI (Linux) does enforce limit on how long password can be. For example, setting password like this UPDATE mysql.user SET ...
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33 views

mysqlcheck -o --all-databases does not finish

I have a problem with my MySQL Databaseserver. I have many tables and there is quite some traffic going on there (around 4 connections per second). Since the phpMyAdmin advised me to do a OPTIMIZE ...
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2answers
413 views

Does a MyISAM table locks if I copy it while MySQL is running? (READ DISCLAIMER)

DISCLAIMER: I'm very aware this is not supposed to be done, but time consistency between tables aren't a concert here and Im trying whatever pops in my mind right now to have alternatives for ...
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2answers
85 views

Can CPU cores be separated for MySQL?

Is it possible to separate CPU cores in Mysql? I understand it is possible for Memory as we can tune it in innodb_buffer_pool_size or innodb_additional_mem_pool_size. How about CPU cores in ...
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2answers
138 views

Linux command to kill all MySQL sessions from a specific User?

How can i kill all sessions from a user in mysql using a linux command line command? I have a user that is using all on my database connections and insted of killing one by one i want to make a ...
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3answers
138 views

Move Complete ORACLE from one system to another

I have 2 identical server with exact disk partitions (OS CENTOS 6.4 both ) [My college central oracle server]. Entire ORACLE HOME ( bin , control files, data files everything on oracle) is on 2nd ...
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43 views

MariaDB : Larger innodb_buffer_pool_size causing SQL updates to be slower

Has anyone here encountered such scenario before where and update statement took longer time to run when innodb_buffer_pool_size is bigger. I've run a few tests using the same statements on around ...
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3answers
71 views

How to use Oracle Installation Prerequisites on Redhat Linux 6.5?

Today I get error below when install Oracle 11gR2 on Redhat Linux 6.5. I follow instruction in this link: http://public-yum.oracle.com/ After I call this command: # yum install ...
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1answer
105 views

Trouble with installing additional modules on Postgresql 9.1 on ALT-Linux

I'm trying to create extension under postgresql 9.1 (Linux): CREATE EXTENSION pg_trgm; but got error: ERROR: could not open extension control file "/usr/share/pgsql/extension/pg_trgm.control": No ...
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1answer
149 views

I'm trying to run an oracle database in virtual box under oracle linux

I'm trying to run a oracle DB in VirtualBox and access it from my host mac OSX , i am using port forwarding to access my guest, I can telnet my guest on the port, however when i try to connect from ...
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2answers
60 views

MySQL: Moving Database from Windows to Linux

I have a Windows based dedicated server have below configuration: Windows edition: Windows Server 2008 R2 Standard Service Pack 1 Processor: Intel(R) Xeon(R) CPU X5460 @3.16GHZ 3.16 GHZ (2 ...
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55 views

Postgresql on Slackware 14.1 (64-bit) Cluster Error

I am attempting to install Postgresql Database on Slackware 14.1. However i am getting an error: Problem running post-install step. Installation may not complete correctly The database cluster ...
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1answer
93 views

Heartbeat Options with MySQL and Possibilities

I would like to understand if the following scenarios are possible in Heartbeat in Linux. Setup: Two Database Servers running Mysql in Active/Passive mode in replication mode having Heartbeat setup ...
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2answers
61 views

ORACLE Shifting from from one version to another

I have RHEL5 server with Oracle Home actual location is SAN, which is mounted on this server. Now for few Reasons I have one more Server with RHEL 6 64Bit. I will map those storage LUNS there. What ...
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40 views

MySQL import low use of resources

I'm importing a largish DB into MySQL (20tables of ~25mill records). As expected this is taking a long time, but I'm curious as to why the process is running using only 0.000 to 0.700 %CPU and 0.87 ...
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1answer
18 views

How can I create DB2 objects with Linux SUDOer authority?

All, I am relatively new to Red hat linux and I have SUDOer authority but unable to create DB2 database or other objects. How can I accomplish this task? Please give examples. Also, is there any ...
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1answer
39 views

Couldn't connect to databasee

I have a dedicated webserver and a dedicated database server Often , i got errors connecting to database server couldn't connect to database Here is my current /etc/my.cnf configuration file ...
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3answers
504 views

how make mysql table name case insensitive in ubuntu

I am using Ubuntu 13.10 and Mysql 5.6 and I know Database Name and Table Name are case sensitive in Ubuntu(some *nix) environment. Now i want mysql should work for as case insensitive. Is it possible. ...
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34 views

Probable database replication issue in LAMP setup with Master/Master MySQL replication

I have been facing issues in my high availability failover (on WAN links) LAMP setup hosting a Drupal CMS based site, approximately after every 2 months both servers suddenly stop responding to http ...
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18 views

What is the “Other” Memory Pool in DB2 LUW?

I have a Memory Pool consuming the better part of my server's memory, but I can't seem to find any proper documentation on what this Memory Pool actually is for. What is the "Other" Memory Pool in ...
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1answer
167 views

Oracle silent install on Redhat Linux (The Global database name was left blank.)

I am installing Oracle 11g in silent mode using the response file that is in the database/response directory. It is three response files in that directory(i.e. dbca.rsp, db_install.rsp and netca.rsp). ...
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90 views

How to set selinux permission for non-standard mysql bin log path?

By default, mysql bin log works in folder /var/log/mysql. but moving to any other share such /mylogs/mysql gives permission error. Below is the exact message: usr/sbin/mysqld: File ...
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2answers
62 views

Reset of root password not working?

Our previous DBA left and didn't note the root password down, and I've been pressganged into doing part of his job until we can hire someone. So I create a file : /root/mysql.password Inside that ...
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41 views

Does using noatime on modern Linux make sense?

Starting from version 2.6.30 (which was released 5 years ago), Linux has the option relatime enabled by default. It means updates of file access time are very infrequent and prudent. But I still see ...
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122 views

Huge load on CPU because of mysql process [closed]

I am getting a huge load on my linux servers because of this query. CPU is on 500% load & this query is causing load. /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql ...
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90 views

MySQL gets slow in Linux server

I'm using a jdbc connection to connect a vaadin application to a MySQL database. It works fine, but after a couple of uses it gets really slow, and even freezes the application to a point I have to ...
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3answers
645 views

Counting postgres open connections without SQL query or connecting to postgres itself

For a monitoring script I need to count the number of open connections to a postgres database. This is done easily enough by opening up a client connection and running a count on the pg_stat_activity ...
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1answer
68 views

Please tell me my data isn't gone… lie to me even

In a moment of ignorance I setup my webserver to auto backup all data to another machine. not a problem except I just mearly cp -R /var/lib/mysql so all I ended up getting was hundreds and hundreds ...
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354 views

sqlldr: command not found

I have a script which has this command 'sqlldr' which gives me the error sqlldr: command not found when I run this script. I googled and found that people say that this command should be there in my ...
2
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1answer
284 views

Mysql error 28 no space left on the device

I keep running in to the same problem with mysql with error code 28 which means there is not enough space left on the device. Now the weird part is that there is enough space, here are some tips i ...
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438 views

How to check last applied archive file at stand by database?

I would like to know the last sequence# of archive file applied on stand by database, to automate the process of removing of archive files at the primary to avoid the file system reaching 100%. This ...
0
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1answer
84 views

Poor SQL performance with raid10

Maybe I'll try my luck here. Server Fault site was quite hostile for non-professional server user. I recently bought HP ProLiant ML310e Gen8 v2 server with 8G's RAM and 4 HP 1TB 6G 7.2k rpm SATA ...
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1answer
110 views

Can I execute an external process via MySQL on table change?

When using triggers, if an update is done to a table then a trigger is executed. This is very convenient. But what I would need is to execute an external script. Is it possible to configure MySQL ...
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0answers
159 views

Postgres Backup on linux server [closed]

I am trying to take backup of postgres from InstallAnyWhere which is installer for linux and windows machine. I am calling pg_dump from Java process builder as command line below cmdLine: ...
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2answers
885 views

mysql multi threading for a single query

I have big db of size 8GB and having 9 million contacts in this db. When we try to retrieve all contacts, it takes nearly 1 or 2 hour (in some cases result in timeout) to retreive all contacts for the ...
0
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1answer
213 views

PostgreSQL - pgAdmin error creating a server

I have the latest versions of PostgreSQL and its GUI-frontend, pgAdmin, installed. When I try to register a new server a fatal error appears when pgAdmin tries to connect to the newly created server - ...
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2answers
64 views

Why its failed on linux server?

I tried to mark disk and got Fail!!! [root@oradbserver3 Server]# /etc/init.d/oracleasm createdisk DISK1 /dev/sda2 Marking disk "DISK1" as an ASM disk: [FAILED]
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1answer
173 views

web interface port for oracle 11g

I am running a fresh Oracle 11g installation created on lunix redhat 5, but I forget the web interface port, I have already tried this https:// localhost:5500/em/ but did'nt work. any help will be ...
0
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1answer
105 views

Kerne module for Oracle 11gR2 RAC on Linux

As per Oracle, it requires three Linux packages to run ASMLib: oracleasm - kernel module oracleasmlib-2.0 - ASMLib libraries oracleasm-support-2.0 - Admin for ASMLib This library versions are OS ...
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33 views

How do I save file data to my newly mounted SSD in mysql innodb continually?

I've recently mounted a new SSD since my disk's empty space had less than 10% (mysql unbuntu linux) and this is what I did in my.cnf file to save data to my new path: innodb_buffer_pool_size=2G ...
0
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1answer
160 views

MySQL Service is not starting on linux

I am having a problem with my database it does not want to start :( the server is running on linux centos 6.2 it was working until I emptied the logs I don't know if this have anything to do with ...
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0answers
130 views

InnoDB: error: space object of table

131212 10:35:18 InnoDB: error: space object of table 'main/wp_m_membership_levels', InnoDB: space id 119 did not exist in memory. Retrying an open. 131212 10:35:18 InnoDB: error: space object of ...
0
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1answer
19 views

Change MySQL 4.1 Windos to MySQL 4.1 Linux- Problem with the key Sensitive in query

I need help to resulucion this problem. change the server MySQL 4.1 run on Windows to MySQL 4.1 run on Linux(debian). This all working, but same query not return the correct data because key ...
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1answer
196 views

Grant postgres superuser to linux account

On my development (Ubuntu linux) laptop I have a postgres OS account, which owns the Postgres installation. When I want to perform any postgres activities, create/drop databases etc, I must first su ...
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2answers
1k views

MySQL on Windows or GNU/Linux?

I've just read this article: http://dev.mysql.com/tech-resources/articles/move_from_microsoft_SQL_Server.html There it says that MySQL on Windows is a good choice. (or is what I've understood) In ...
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1answer
944 views

MySQL - Server collation utf8_unicode_ci vs table collation utf8_bin: compatibility and performance

I'm not sure whether this belongs to SE DBA, but it sounds more logical ... Our MySQL 5.5.32 on Ubuntu 12.04 64 uses utf8_unicode_ci for the Server collation and some tables, like phpBB3, uses ...
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1answer
306 views

TCP sockets bottleneck with InnoDB/Debian?

We have a big mysql performance issue on a production environment with 18 "front" servers sending mysql queries to a unique mysql server. We are using Redis on each front server for a number of ...