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4
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3answers
3k views

Optimal Number of MySQL InnoDB Buffer Pool Instances

Server Characteristics Total system RAM: 8GB (running MySQL + other stuff than MySQL on it i.e. not dedicated to MySQL) Number of CPU Cores: 6 I have data in the db amounting to about 2GB I have ...
2
votes
2answers
2k 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 ...
8
votes
4answers
17k views

Making sense of INNODB buffer pool stats

After having read this page in the mysql documentation, I tried to make sense of our current InnoDB usage. Currently, we allocate 6GB of RAM for the buffer pool. Our database size is about the same. ...
6
votes
4answers
476 views

How can I Debug a Buffer Issue?

I have a production "Microsoft SQL Server 2012 (SP1) - 11.0.3128.0 (X64)" that is showing weird buffer and page life expectancy (PLE) symptoms. I am running this every minute on my server (to track ...
5
votes
2answers
203 views

Buffer Size Changing?

I have a production database that is experiencing wildly fluctuating Page Life Expectancy (PLE) issues. (It crashes to zero at random times.) I have been researching the PLE issue and have found ...
2
votes
1answer
2k views

InnoDB Buffer Pool Hit Rate

As given at http://cherry.world.edoors.com/COBFKUqnUdBY one can obtain buffer hit ratio by following sql query: SELECT round ((P2.variable_value / P1.variable_value),4), P2.variable_value, ...
1
vote
1answer
399 views

Should indexes automatically be placed into their own bufferpool?

We work with DB2 LUW (specifically we are currently on 9.7 FP4) running on AIX. Per best practices from IBM, they recommend that when you build a table, you place the data, the indexes, and LOBs/LONG ...