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23 views

Better configuration for a In-Memory MySQL database?

I have a local MySQL database for the only purpose of execute some PHP tests. To improve the speed of the execution, I created the database in memory using the ENGINE=MEMORY statement in every table ...
2
votes
1answer
68 views

Memory Table and Disk Table

I'm running a pretty big (or maybe I should call it SELECT & INSERT-intensive) database. Now I've heard here and there that a MEMORY-based table is better for my situation (since I now run on a ...
1
vote
1answer
34 views

Using ddl triggers with in-memory tables

I've created server scope ddl trigger to audit user activities on the server. Now if someone tries to create in-memory table the statement fails with the following error: Error SQL72014: .Net ...
0
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0answers
22 views

MySQL Cluster in-memory only table

I am testing MySQL cluster with NDBCLUSTER engine. We intend to use MySQL cluster DB to contain READ PERFORMANCE critical tables which will reside only in memory. We have also tried the MEMORY ...
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0answers
16 views

Switching SQLite environments

I submitted this on SuperUser without response; someone suggested I try it here. I like Firefox's SQLite Manager plugin because it's easy to show people how to use it. This is helpful if I want to ...
3
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0answers
64 views

Can Oracle TimesTen (or 12c's In-Memory) benefit from GPU?

I have looked into TimesTen and In-Memory recently. They claim they use SIMD to speed up queries. We use HP DL380 G9 Servers for our DB. Since This series are limited to the Intel Core architecture, ...
0
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1answer
40 views

Can not install a database, can I still learn though?

I am given access to a domain where I can put my code in and it will go public, like in this example. In order to store the data right now, I am using PHP and I write the data to a file. When the page ...
2
votes
1answer
322 views

Slow inserts in oracle 12c inmemory table

We are running some tests to check the in-memory performance on a 12c (12.1.0.2.4 EE) RAC. Servers have 56GB memory and 20core CPUs. Our plan is to have a few read-performance critical tables in ...
1
vote
1answer
45 views

Provides Oracle's database in-memory?

I'm trying to find out, if Oracle's newest database release 12c comes per default as an in-memory database or does it use TimesTen for this feature? According to Wikipedia (Oracle Database) it ...
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0answers
92 views

Oracle In-Memory POPULATE_STATUS does not change to completed

I'm experimenting with the Oracle In-memory options for BI purposes, when I'm trying to populate one table to in-memory in the v$im_segments the POPULATE_STATUS does not change to completed, for other ...
3
votes
2answers
1k views

Calculating RAM requirements for an in-memory database [closed]

In general, how much RAM does an in-memory database require? I would assume it requires enough RAM for: Operating system and general system services, plus DBMS, plus the entire database (same amount ...
1
vote
1answer
61 views

What is the disadvantage of maintaining both row and column table storage?

I just watched Oracle's In Memory database release. I can understand that removing a lot OLAP indexes accelerated the database a bit. But does that really mean maintaining 2 table storages doesn't ...
3
votes
1answer
1k views

Oracle TimesTen vs Oracle database in-memory

Oracle has recently announced its latest Oracle database in-memory feature in 12c. Oracle already had an in-memory database TimesTen and now I was wondering as to what the the differences between ...
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0answers
250 views

SQL Server 2014 In-Memory tables [closed]

For the past couple of weeks I sort of tested the new In-Memory thing in SQL Server 2014 (never worked with SQL Server 2012, jumped from 2008R2 straight to 2014, so if this new feature is present in ...
5
votes
1answer
440 views

SQL Server 2014 In Memory OLTP - Garbage Collection on Transaction Rollback

In SQL Server 2014, In Memory OLTP, What happens, if a transaction is rolled back and newly created version of row is no more required. Is it duty of garbage collector to remove even such type of rows ...
2
votes
0answers
417 views

In-memory database vs RAM-disk

In SQLite, are there any differences in performance/features/reliability/... between: 1) an in-memory database: rc = sqlite3_open("file::memory:", &db); 2) a database on a RAM-disk? The ...
7
votes
3answers
8k views

ALTER DATABASE statement not allowed within multi-statement transaction

I've downloaded the AdventureWorks based In-memory sample from here, and followed all the steps described in the accompanying doc. However, when I try to run the script in SQL Server Management ...
1
vote
3answers
224 views

in-memory SQL database system [closed]

In an application, I am using mysql's TEMPORARY TABLE. Since this application does not need permanent tables, I wonder if I can find an alternative RDMS designed for memory tables. I hope to find an ...
8
votes
3answers
1k views

What advantages does in-memory OLAP have over traditional systems with significant memory?

Do in-memory OLAP engines have advantages over the traditional OLAP engines backed by enough RAM to contain the entire cube(s)? For example, if I use a MOLAP engine (SSAS) and GB / TB of RAM where ...