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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programme scrambeled the screen [on hold]

i am having problem with my programme i purchased.program is in vb and datbase used is SQL 2005 database.problem is that when i used to enter or querycertain no of data its screen scrambled and i ...
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31 views

Why is my Target Server Memory slightly higher than my Total Server Memory?

I'm doing a performance test on a high traffic (16000+ users, estimated 1000+ concurrent at peak) Microsoft Dynamics database. The server has gone on line a few months ago, and I'm doing some tests to ...
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2answers
140 views

Does CPU utilization affect the cost of foreign NUMA access?

Scenario Let's assume I have a SQL Server with 4 sockets with each 1 NUMA node. Each socket has 4 physical cores. There is 512 GB of memory total so each NUMA node has 128 GB of RAM. A key table is ...
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2answers
64 views

MySQL: memory requirements for django app with 1 big table (460M rows)

I have created a django app that is running on virtual machine. All db tables are rather small (up to 1M rows) but recently I was asked to add a big table (460M rows). CREATE TABLE `genescorrelation` ...
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1answer
14 views

Oracle 11g PGA advice view is empty when it shouldn't

I have the following situation in an Oracle 11g server (it's part of a RAC). PGA_AGGREGATE_TARGET is set, STATISTICS_LEVEL is TYPICAL, and yet V$PGA_TARGET_ADVICE shows up empty. Why does this happen? ...
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32 views

Hard Limit to SQL Server 2012 Memory Usage [duplicate]

It seems that even in SQL Server 2012, the maximum memory usage settings is not a hard limit. I've read some SQLOS Team blogs about this, and those as well as several MSDN articles seem to state that ...
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0answers
16 views

MySQL sizing tool for Hardware [closed]

Is there any sizing tool for hardware? I'm not sure what kind of servers we need to offer to my customer like CPU, memory, Disk or number of servers? What kind of questions do we need to ask our ...
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81 views

SQL Server 2012 memory issue [closed]

I am having performance issues on a Windows 2012 Server running SQL 2012. When I run the DBCC MEMORYSTATUS command I receive the following. Process/System Counts Value Available Physical Memory ...
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31 views

SQL Server 2012 memory issue [duplicate]

I am having performance issues on a Windows 2012 Server running SQL 2012. When I run the DBCC MEMORYSTATUS command I receive the following. ...
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0answers
8 views

Access algorithms in Partial Index implementation of PostgreSQL 9.4?

I am studying big-O time-space complexities of different algorithms with the partial index of PostgreSQL 9.4: introsort (O(n log n)-time, O(log n)-space) and heapsort (O(n log(n))-time ...
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1answer
16 views

Address Windowing Extensions Overhead

I just found another SQL Server (2008r2) with AWE enabled on a 64-bit OS/SQL combination. Has anyone done an research as to the overhead created by enabling AWE on the 64-bit OS/SQL combination? It ...
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1answer
32 views

Virtualized SQL Server Memory Oddity

I've not seen this before, though perhaps it is common. I am looking at a virtualized (VMWare 5.5) SQL Server (2008R2 on Windows 2008 R2). What I am seeing is that in Task Manager, sqlserver.exe is ...
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1answer
25 views

SSAS and SQL Server on the same server

I have a server that is primarily used for SSAS, heavy processing, however I have SQL Server on it alongside SSAS, but I don't want sql server to hold ssas back. I have set the SQL Server MAX memory ...
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2answers
136 views

sql server max memory includes SSIS?

I have installed 2 instances of sql server plus SSIS on the following server. Note the amount of RAM is nearly 384 GB And this is the max and min memory settings that I have applied to my 2 ...
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0answers
38 views

Improve postgreql insert performance when compared to Oracle. Low memory utilization by Postgresql threads

I am trying to improve the performance of Postgresql (version 9.2.3) inserts for a simple table with 1 bigint, 1 varchar, 1 float and 2 time stamps. A simple replication of my JDBC program is ...
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1answer
38 views

Setting shared_buffers over 320 MB prevents Postgres from restarting

I'm running Postgres 8.1 on a CentOS 5 system with 4 GB of RAM. Whenever I set shared_buffers above 320 MB, it won't run. I've checked SHMMAX and it's at 4294967295 which is the max allowed for a ...
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1answer
50 views

MariaDB Spider Engine Out of Memory

I had almost standard MariaDB with InnoDB engine working fine but I wanted to test out the Spider Engine + Sharding/Partitioning. I had a query which was passing fine on the MariaDB InnoDB for ...
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50 views

A significant part of sql server process memory has been paged out. Lots of free memory though

Having a problem where my SQL Server 2012 SP2 Enterprise server says that most of SQL Server's memory has been paged out to disk but there's over 100GB free (of 256GB). From there system performance ...
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1answer
29 views

How to determine RAM usage of a query

I would like a detailed explanation on the below question. This is regarding the Mysql RDBMS. Thanks in advance. What are the factors that would affect the RAM usage by a query. how to ...
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2answers
97 views

Would increasing innodb buffer pool size prevent a mysql crash?

My server keeps running out of memory for mysql. I keep getting. 150708 3:39:09 [ERROR] /usr/sbin/mysqld: Out of memory (Needed 258064 bytes) When I looked in my.cnf I saw that ...
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1answer
58 views

SQL Server process only using half of the memory on host

We doubled the memory on host that has a SQL Server Enterprise 2014 instance on it. After a reboot of the server we noticed that the SQL service is only using half of the memory. A little background ...
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4answers
68 views

RAM utilization

We are using SQL Server 2014 on Windows server 2008 Web edition (64 bit). Total RAM of OS is 8 GB .When we check high physical memory usage in the task manager it shows nearly 90 to 95 % full but I ...
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2answers
510 views

Why is SQL Server 2014 consuming so much RAM with no active data stored?

I'm running SQL Server 2014 on my laptop along with a ton of other installed applications, from Visual Studio to video games. This is obviously not a production server, but for development and ...
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2answers
40 views

How do I limit Oracle's memory use?

I would like to use Oracle's automatic memory management, with a limit of around 4GB. (Past experience has shown this to be plenty for my dev PC and that it is easier to get an idea about any ...
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3answers
227 views

Configure RAM for SQL Server and NUMA

Accidental DB admin here. Question: Would you still manually limit max RAM for SQL Server even though the sole purpose of that server is to serve SQL Server database engine only? I have Microsoft ...
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1answer
32 views

ORA-00845 after deleting files accidentally at /dev/shm

I have two instances (ORA1 and ORA2) of Oracle 11g at the same machine. One is starting the other cannot startup anymore. What happend: First my disk was full, so I accidentally deleted all ...
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76 views

MEMORYCLERK_SQLOPTIMIZER in SQL 2012 Memory usage extremely high and causes server to crash

I have been having issues with our SQL server for a while now. It seems to run out of memory every few days and when I look at the memory dump, the MEMORYCLERK_SQLOPTIMIZER seem to take over memory ...
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1answer
75 views

SQL Server 2012 Crashes and service doesn't restart

We've been having an issue with our SQL server lately. It seems that the server will run out of memory and then crash. For some reason, the sql service wouldn't restart. I would have to go and ...
4
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1answer
130 views

NUMA Nodes - MAXDOP - PLE

We have a server with 8 CPUS across 2 NUMAs with hyperthreading enabled. Currently Maxdop is set to 8, but actually should be set to 4 as per the Maxdop section of this article: ...
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2answers
92 views

MySQL Server > 90% memory consumption

I have a fairly large (16 vCPU / 47 GB of RAM) linode box which hosts a running MySQL Server. This box currently does nothing else (and we are not planning to install anything else on it for now). ...
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1answer
79 views

System.OutOfMemoryException SQL Server 2012 and 2008R2

I have a 64-bit and 64gb memory for both SQL Server 2012 and 2008R2, when I generate a report w/c has 900K rows, it finished the query smoothly and no problem, but when I'm going to copy the result ...
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2answers
83 views

SQL Server 2008 R2 - Memory Allocation

We have a SQL Server 2008 R2 instance that is running on a Windows Server 2008 R2 Enterprise server that has been allocated 128GB of memory. However, it maxes out at 70GB. Can anyone tell me how I can ...
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1answer
171 views

Memory usage on select for large number of rows

I am trying to dump the entire contents of a large table, from the command line using pqsl, but am running into a problem where memory usage goes up, to the point where the process is killed, before ...
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1answer
40 views

Increase memory limit when server is stopped

There was a local SQL Server 2012 instance. Once memory has decreased to critical 128 MB and then has stopped by me. I can not start it (idea: not enough memory). Is it possible to increase this ...
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50 views

Relationship between file shrink and used memory in SQL Server

Some background info: this is a test SQL Server 2012, with restored databases from production servers, all of them with over 20% space available in the data file, up to even 50%. I'd rather restore as ...
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1answer
97 views

SQL server Memory components

I am trying to understand different memory components in sql,so far my research lead me understand below ,If SO DBAs can confirm my understanding/add something if i am missing,i will be really ...
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77 views

Maxing out the shared pool's memory by executing many UPDATE statements (ORA-04031)

I was executing a bunch of UPDATE statement. Around ~32.8K got executed and committed, then got the error: cx_Oracle.DatabaseError: ORA-04031: unable to allocate 3896 bytes of shared memory ...
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33 views

Memory consumption of production MySQL

The MySQL database on one of my production servers consumes a lot of memory. The problem is that I cannot trace what causes that kind of high memory usage. Following values illustrate the problem. ...
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1answer
97 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
113 views

High Page Faults/sec low Page Reads/sec

I currently have Page Faults/sec avergaing 1269 while my Page Reads/sec is averaging 0.3. I am just trying to interpret what this means. I assume I am getting lots of soft page faults in this case ...
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40 views

SQL Server consuming large amount of RAM [duplicate]

I have Server 2012 with two 2.10 Ghz processors and 64GB of RAM. I have SQL server 2008 installed on this server. but this SQL server is consuming 70-80% of memory. I have limited SQL memory to 24GB ...
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43 views

MySQL Cluster 7.4.6 - Analyze table failure on 15m reference table

I'm running MySQL Cluster 7.4.6 on Azure VM's with the following infrastructure: 2 x Mgmt Nodes: Ubuntu 14.10LTS, 2 cores, 3.5GB ram 2 x MySQL API Nodes: Ubuntu 14.10LTS, 2 cores, 3.5GB ram 2 x Data ...
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2answers
67 views

SQL Server total memory less than target memory, lot of extra memory unallocated

The situation is the following: We have a SQL2008r2 server (64bit on 64bit Windows) with SSRS installed on it. The Max Memory is set to 6GB, the server has 12GB total memory. The target server ...
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1answer
100 views

Hyper-V Dynamic Memory and SQL Server

I will probably get voted down for this, but does anyone have a good place to start other than the Best Practices Documentation for using Dynamic memory with SQL server. We are experiencing issues ...
4
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2answers
254 views

External Memory Pressure

I have a few "gaps" in my understanding of external memory pressure. I've found quite a bit of helpful information online, including this info from SQLSkills.com. SQL Server has a built-in ...
0
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1answer
67 views

Performance of MySQL BLOB fields processing

Suppose, I have large (about 1 GB) strings in ASCII encoding. I have to choose whether to store them as separate blob fields or split each one of them into smaller pieces and then store them as ...
2
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0answers
168 views

Multi-Instance Windows Failover Cluster - Min / Max Memory Allocation Dilemma

We run numerous 2 node SQL Server 2008 R2 Failover Clusters in Windows Server 2008 R2 on a VMWare eSXi virtual platform. Each cluster hosts 3-4 SQL instances with varying degrees of memory ...
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0answers
14 views

maximum server memory setting in SQL Server [duplicate]

Just had a memory issue on a 64GB of RAM machine with SQL Server 2012 SP2. 3 running db engine instances, each limited to 16GB (16384). But noticed in Task manager that sqlservr.exe was at over 30GB ...
0
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1answer
81 views

Maximum possible memory usage: 23.6G (785% of installed RAM)

I have a virtualized 32bits Server for Mysql (RAM : 115 Go). I am trying to optimize with mysqltuner and I get this : >> MySQLTuner 1.1.1 - Major Hayden <major@mhtx.net> >> Bug ...
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56 views

During Peak hours memory utilization is too high?

I am using MySQL 5.1 and its memory size is 16GB,during peak hours it consuming complete memory only 200 mb of memory were free and My database size is only 500mb as well as no long running queries ...