When used in the context of databases, memory refers to RAM directly addressable by the CPU as opposed to going through the I/O subsystem.

learn more… | top users | synonyms

1
vote
2answers
43 views

Do Inactive MySQL Databases Consume Memory?

I have inactive databases that are on the server just for archive purposes. I know I can do mysqldump for all of them, but I am not 100% sure they are inactive. When I started my system I didn't ...
1
vote
2answers
582 views

Why would increase in innodb_buffer_pool_size slow down MySQL?

5.1.68-cll - MySQL Community Server on CentOS The system has 32GB of RAM. I increased innodb_buffer_pool_size from 10240M to 15360M (10GB -> 15GB). Time taken for a series of identical operations ...
0
votes
2answers
37 views

Is there a way to enable MariaDB MEMORY storage engine for every table?

I am new to MariaDB and interested in using it because I want to use MEMORY storage engine for every table. I read MEMORY storage engine on mariadb.com and it seems like I had to specify storage ...
4
votes
1answer
262 views

How to determine when to reduce physical memory for SQL Server?

If I repeatedly notice SQL Server reporting a lot of free memory, can I likely remove about that amount of memory from the server without affecting performance? Or, can/should it use more for caching? ...
3
votes
1answer
56 views

MySQL runs out of memory when importing innodb database

I have a small VPS with 512MB RAM and no swap (can't have any). I am importing a 1.5GB innodb database with mysql -u -p < database.sql Before the operation can finish it says : Lost connection ...
1
vote
1answer
975 views

Cannot set MEMORY_TARGET for Oracle 11.2

I'm trying to configure an Oracle installation on a developer machine (Windows 7 Professional 64bit). The machine has 16GB of RAM and I'd like to configure MEMORY_MAX_TARGET to 8g but have ...
1
vote
1answer
192 views

MySQL memory usage issues?

I have a MySQL instance running on my Ubuntu server that is eating up most of the memory on the machine. I currently have 2 GB of ram installed on the machine, and MySQL is using 1983 MB. Most of my ...
0
votes
1answer
91 views

Does MySQL load the entire row into memory, or just the columns used in WHERE, ORDER BY and GROUP BY?

I have a table that isn't very large row wise (in the 100ks range), but that contains a lot of raw data that is very large in size. Despite having a relatively little number of rows, it's around ...
3
votes
0answers
115 views

What are reasonable options for an in-memory multi-core database?

I'm going to preface this with pointing out that I only need somewhat persistent data. The purpose of this database platform would be to support statistical analysis in R. I usually build my tables ...
2
votes
0answers
258 views

SQL Server Internal Memory Pressure

I am trying to identify the cause of internal memory pressure. From what I have learned, Resource Monitor Ring Buffer returns an indicator for internal pressure. For example by using this query, ...
2
votes
0answers
593 views

“custom archiver out of memory” error when restoring large DB using pg_restore

I'm trying to a restore a local copy of a 30GB DB (with only one table) dumped using the Heroku wrappers (described here) using pg_restore. The Heroku DB is using 9.1.7 and I have had the same result ...
1
vote
0answers
36 views

Advice to set minimum preferable value for MEMORY_TARGET

I have a server having 90GB of RAM. I have set MEMORY_TARGET to 60GB, because OEM showed me the following graph: Which tells that, if you set the parameter to the value of 60GB, the performance ...
1
vote
0answers
73 views

The memory usage of SQL Server keeps growing

We have a production SQL Server 2008r2 x64. 16GB RAM and this server is used by the application (hosted) and SQL Server. The max memory setting = 6GB The min memory setting = 128MB. There are ~25k ...
1
vote
0answers
125 views

MySql Very Slow Writes & Out of memory error

I am having a rds db instance in AWS which is used by Drupal 7 instatllation. I am getting the below error messages in the log: > 130912 11:57:39 [ERROR] /rdsdbbin/mysql/bin/mysqld: Out of memory ...
1
vote
0answers
49 views

memcached+mysql cluster maximum memory

I'm deploying a system with memcached and mysql cluster. The command line is: memcached -E lib/ndb_engine.so -e "connectstring=maddy:1186;role=dev" I can't specify the -m argument since I used -E ...
0
votes
0answers
17 views

MariaDB Galera setup with drastically different amounts of memory used on cluster nodes - why?

We have a 3 node MariaDB Galera cluster. All nodes are identical and the config on each is identical. They have 64GB of RAM each. The output of the following query is 28: SELECT ...
0
votes
0answers
22 views

How to avoid hitting the memory ceiling with temporary table?

I running a MySql DB at a webhosting company. The size limit of a schema/DB is set to 100Mb. I'm using temporary tables in my query like: CREATE TEMPORARY TABLE t_foo SELECT * FROM Foo INNER JOIN ...
0
votes
0answers
74 views

How much RAM do I need?

Let's assume a query like the following as typical: select A.`date` as `date`, count(*) as N from A as A join B as B on B.id = A.b_id join C as C on C.id = B.c_id join D as D on D.id = ...
0
votes
0answers
54 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: ...
0
votes
0answers
128 views

After RAM upgrade on 32-bit Oracle server, ORA-04031: unable to allocate x bytes of shared memory

We are in the process of upgrading our Oracle database server at work, from SUSE Linux Enterprise Server 10.4 / Oracle 10g / 4GB RAM (Intel 32-bit) to Scientific Linux 6.4 / Oracle 12c / 8GB RAM ...
0
votes
0answers
56 views

MongoDB RAM requirements doubt

I have a data file with 100 million documents. The number of documents is expected to always remain between 100 million and 200 million for atleast a year. I have 15 GB Ram. Currently the update ...