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.

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SQL Server Buffer Pool Utilization under VMWare

I recently migrated a physical SQL Server box (2012) over to ESX (5.1) simply for ease of administration. It is and will be the only guest on the server. As expected there was a marginal performance ...
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2answers
154 views

SQL Server memory issue

As soon as I start SQL Server with no application querying, in the task manager it starts to consume memory very fast till it consumes around 15GB. How can I resolve this issue?
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SQL Server - Anyone use SUMA, trace flag 8048, or trace flag 8015?

Recently included SQL Server startup Trace Flag 8048 to resolve a serious spinlock contention issue in a SQL Server 2008 R2 system. Interested to hear from others who have found usage cases where ...
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MongoDB: What does '[DataFileSync] flushing mmaps took … ms for … files' mean?

I am building an index in MongoDB for a large collections (~300GB) and the db terminal window keeps printing: [DataFileSync] flushing mmaps took 10920ms for 151 files The time that it takes to ...
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1answer
197 views

Why does a MySQL MEMORY-backed table take so much more space than on disk?

I have a single InnoDB table on disk, with ~1,107,423 rows and taking up 45.6 MiB disk space. The structure is: messageid int(11) signature varchar(255) When I create a MEMORY-backed version of ...
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569 views

PostgreSQL 9.2.1 out of memory on \COPY [closed]

I'm running a postgreSQL 9.2.1 installation in a FreeBSD 9.0 Jail with default settings. I've configured loader.conf according to this post: ...
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2answers
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How do I shrink the innodb file ibdata1 without dumping all databases?

InnoDB stores all tables in one big file ibdata1. After dropping a big table, the file is keeping its size no matter how big the table was. How can I shrink that file without having to dump and ...
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2answers
301 views

Minimum/Maximum Server Memory in SQL Server 2005 with /3GB and /Userva switches

I have a 32-Bit Windows 2003 machine with 3.75GB RAM running one SQL Server 2005 instance. I am trying to optimize memory. If I use the switches in boot.ini like below, /3GB /Userva=2490 should I ...
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1answer
2k views

SSIS: “The buffer manager cannot write 8 bytes to file”

We have about 60 or more SSAS cubes on one server. All the cubes have the same structure. Each cube has a different size because each cube has a different underlying data warehouse. However the schema ...
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2answers
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MySQL how to release memory used up by SELECT

I executed an INSERT IGNORE combined with SELECT from large table. The SELECT took up 16GB of memory and went into SWAP before I terminated it with CTRL+C. INSERT IGNORE INTO sid(sid) SELECT sid ...
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3answers
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Memory problems with MySQLWorkbench

I'm currently using MySQLWorkbench 5.2.40 on my PC (8GB rRM, Corei7). I have a table with almost 1.5 million records, which I need to visually look over. Surprisingly, the total size does not exceed ...
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1answer
866 views

Determining SQL Server memory requirements

I just a bit of an issue there where a SQL Server database was eating up quite a lot of RAM for its size. A bit of background: The database is for a small content managed website. The CMS is custom ...
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Optimizing DELETE Query on MySQL MEMORY Table

I run a large forum which maintains a MySQL database for backend data storage. The 'session' table tracks logged in users & guests. It is currently about 100k records, so not really that large. ...
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2answers
2k views

SQL Server Memory Paging Issue

We have a dedicated SQL server running Windows Server 2003 R2 Standard x64 SP2 and SQL Server 2005 (64-bit) Standard Edition with 16GB RAM. Every night we're experiencing severe performance issues ...
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2answers
12k views

Quick look at how much RAM is allocated to SQL Server?

With SQL Server 2005, you could look at the Task Manager and, at least, get a cursory look at how much memory is allocated to SQL Server. With SQL Server 2008, the Working Set or Commit Size never ...
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2answers
455 views

Can I prove my database does not have memory issues?

(This is a continuation of do indexes consume memory) A fellow database developer believes we are having memory issues. He has seen increased run times in some standard queries - going from under 10 ...
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2answers
667 views

Plan Cache Pages by Database in SQL Server 2008R2

Is it possible to get a break down of how many plan cache pages are being used per database? Perfmon seems to only have the total for the server, but maybe there is a DMV with more detail? Also, does ...
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3answers
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SQL Server 2008 R2 High memory usage

I have SQL Server 2008 R2 that runs multiple jobs over night, the problem is SQL Server will eat up all RAM and CPU, then it will not release the RAM resources after the job finishes, as a workaround ...
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4answers
16k views

tuning postgresql for large amounts of ram

I have two identical servers (in terms of hardware), they are both standard installations of windows server 2008 r2, with minimal software installed (basically my code and required stuff like jvm ...
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3answers
12k views

How to use insert delay with the InnoDB engine and use less connection for insert statements?

I'm working on an application which involves a lot of database writes, approximately ~70% inserts and 30% reads. This ratio would also include updates which I consider to be one read and one write. ...
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1answer
348 views

PostgreSQL memory spike upgrade from 8.2 to 9.1

We recently upgraded a few of our development computers from PostgreSQL 8.2 to 9.1, with plans on eventually upgrading our production servers. Everything seems well with the restore of the databases, ...
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2answers
16k views

Why is MySQL is creating so many temporary tables on disk?

Can any configuration mistake lead to creating too many temp tables by mysql..mysql tuner shows Current max_heap_table_size = 200 M Current tmp_table_size = 200 M Of 17158 temp tables, 30% were ...
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1answer
623 views

SQL Server falling below 5000 free pages

I have set alerts on two SQL Server 2005 instances I have in production. One of those alerts is sent whenever the Free Pages performance counter falls below the 5000 pages mark. Both servers normally ...
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2answers
704 views

Out of memory mysql was aborted

I am using windows 2003 server, with 8G of RAM and MySQL was installed on It. I am getting error as follows out of memory.[ERROR] mysqld: Out of memory (Needed 523712 bytes). The configuration ...
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1answer
196 views

memcached service stopped unexpectedly

I am working with MySQL Cluster 7.2.4 memcached 1.6 I started memcached service with ndb-caching option: memcached -E /usr/local/mysql/lib/ndb_engine.so -e ...
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1answer
466 views

How to increase the amount of memory sql server uses on the server?

On the db server, we have 4 GB of memory. Currently, the memory utilization of Sql Server 2005 on that server is 1,725,000 K and the total memory usage is stable at 2.04 GB. The Cpu usage on the ...
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getting error while starting memecached service with ndb engine

i am installed memcached library by following the steps in the internet. now there is a binary file created in bin folder of mysql now i exicuting the command memcached i am getting error like this ...
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mysql out of available memory

We have a dedicated MySQL server with 16GB of RAM that's serving 8 web workers with relatively high traffic (over 1000 requests per second at peak traffic) At peak we're seeing the following errors ...
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1answer
603 views

How much memory is a table taking up?

Is there a way to find out how much memory a table is taking up in SQL Server (2005 and greater)? For example, suppose I have a table with 30 million records. I'd like to know how many pages ...
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2answers
270 views

SQL Server 2008R2 Ent + Win2003 Ent R2 32bit will not use all available memory

Server: HP ProLiant DL380 G5 2 proc -2x QuadCore Intel Xeon E5450, 3000 MHz Memory- 12288 Мб (DDR2-667 Fully Buffered ECC DDR2 SDRAM) Settings: /3GB in the boot.ini. /PAE in the boot.ini. ...
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2answers
3k views

View Postgresql Memory Usage

I'm running Postgresql on a Ubuntu server and need to be able to monitor its memory usage. Currently I have scripts running in a one-minute cron job that monitor/log various statistics and need to ...
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2answers
100 views

MySQL still holding memory after I shut it down?

I used this command to shutdown MySQL, however it seems the amount of free memory on my box has not changed? That seems to odd. /usr/local/webserver/mysql/bin/mysqladmin -u ${mysql_username} ...
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ORA-04031: unable to allocate bytes of shared memory (“”,“”,“”,“”)

I am receiving this error in a development database. It happens on some specific queries (simple inserts and deletes via .NET application). The database is used by one user, and error happens ...
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How much memory will a MEMORY table take up?

Let's say I have a MyISAM table with a data length of 4.8GB and an index length of 6.2GB. So, a total data size of eleven gig. How much memory would this require, were I to convert it to a MEMORY ...
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1answer
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I have lots of free memory. How do I use it to increase performance?

I am running Litespeed (with suExec, PHP SAPI), MySQL, DirectAdmin, named on a VPS with a 16-core Xeon CPU and 2GB RAM. Currently, only 300 MB out of 2048 are used. It might sound a stupid, but how ...
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2answers
316 views

Is it important to release memory back to the server?

I have a SQL Server 2008 R2 instance running on a production system. I'm not a DBA; I'm more a developer, but my client is currently asking me: How important is it to release memory from SQL Server ...
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2answers
9k views

Is InnoDB Engine up to speed against Memory Engine?

I am exploring the efficiency of different database engines in MySQL version 5.5.18 to see which is best suited for use with a range query on a dataset of 5 million rows: SELECT P.col1, P.col2, ...
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1answer
3k views

Mysql Memory table getting many locks

On my site I log every pageview (date, ip, referrer, page, etc) in a simple mysql table. This table has the following activity: 1 SELECT per minute 1 DELETE per minute no UPDATE queries Lots of ...
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1answer
378 views

InnoDB table vs MEMORY table for a mysql environment with many inserts

I run my sites all on InnoDB tables which is working really well so far. Now I like to know what is going on in real-time on my sites, so I store each pageview (page, referrer, IP, hostname, etc) in ...
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2answers
4k views

Microsoft SQL Server 2008 Memory

I am running MSSQL 2008 Enterprise and in the configuration of the server the Max memory amount is set to 2147483647 MB. My Question is, the server has 192 GB of ram,the number in the config can't be ...
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2answers
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Mysql consumes a lot of memory

Here is my situation. I have an ubuntu server monitored by nagios. recently nagios sends alarms regarding the memory consumption on the server. I logged into the server and executed the top command ...
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RAM/memory based databases

I am looking for a RAM/memory based database, and these two seem to be interesting: SQLite Oracle Berkeley DB Do you have any other suggestions? I need more than one executable to be able to ...
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4answers
4k views

MySQL Cluster RAM requirement

From MySQL 5.1, the data doesn't need to be entirely in memory anymore. I've read that the indexed columns (I think the entire index structure) must still be in memory (MySQL High Availability, 2010, ...
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4answers
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SQL Server Max Memory not limiting use of RAM

I would like your input on this. I have a sql server 2008r2 Ent. Ed. 64bit with 16 cores and 64GB RAM. There is one instance of SQL server patched fully as of 20111014. The max ram is set to 60000MB. ...
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votes
3answers
511 views

RAM Impact on Oracle database operations

We are seeing drastic change in the amount of time taken for db operations depending on ram size. The same content when inserted into a db running on a 4gb ram machine takes about 600% more than into ...
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1answer
75 views

RAM Impact on database operations [duplicate]

Possible Duplicate: RAM Impact on Oracle database operations We are seeing drastic change in the amount of time taken for db operations depending on ram size. The same content when ...
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1answer
2k views

Why does MySQL use all of memory and goes into swap when doing lots of delayed inserts?

We have a database server running Centos 5.6 64bit 64Gb of RAM. The server is idle most of the time. However, every hour it gets a lot of DELAYED inserts. Up to 3 mil INSERTs per hour into a MyISAM ...
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SQL Server 2008 R2 “Ghost Memory”?

We have a dedicated SQL Server 2008 R2 machine that is experiencing some strange memory issues.. The machine itself has plenty of resources including two quad-core processors, 16gb of RAM and 64bit ...
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3answers
7k views

How to free SQL Server memory?

I have a SQL Server sandbox installation on my local computer. I have set the memory SQL Server instance can use to 1000 mb. When running an intensive operation, memory usage rises up to 1000 mb. When ...
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4answers
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Is it feasible to have MySQL in-memory storage engine utilize 512 GB of RAM?

I am considering scaling up instead of scaling out. Therefore, I am interested to hear whether it is feasible to utilize the MySQL in-memory storage engine for a database that is 500+ GB, given that ...