Posts Categorized: Pythian

InnoDB error: Total number of locks exceeds the lock table size

Recently, one of our customers had a problem with one of their replication slaves where a sql statement gave an error while executing on the slave which was executed successfully on the Master server. The slave stopped with the error. We found the main difference in MySQL configuration between Master and Slave was the amount of memory allocated to innodb_buffer_pool_size because Slave was running several MySQL instances that were used for backup purposes. We need to increase the memory of innodb_buffer_pool_size variable where the locks table can fit in the configuration file and restart the database. This should fix the problem.

Log Buffer #219, A Carnival of the Vanities for DBAs

There are plethora of thrilling business software trends on the horizon as the summer of 2011 starts. Many of these will significantly impact IT organizations seeking to align IT operations with business objectives. Awareness of such trends can help you to keep ahead of the competition. What better way to get abreast of these trends in a nutshell than the Log Buffer? Log Buffer #219 is in your hands to enjoy.

Log Buffer #218, A Carnival of the Vanities for DBAs

Oracle’s assault on the global market goes on with full might and as it adds new products in it’s array, SQL Server also strives hard to get the attention of people through various public appearances, and MySQL is also not behind as its growing array of bloggers marches on. This week’s Log Buffer casts a shadow on some selective blogs from these three technology in its latest edition Log Buffer #218.

Announcing the Flash Cache Query Tool for Oracle Exadata

Pythian is pleased to announce the new Flash Cache Query Tool for Oracle Exadata, developed by our Senior Consultant, and Oracle ACE, Christo Kutrovsky. This tool will be most valuable for Exadata DBAs and Exadata Architects that are trying to understand if the Oracle Exadata Flash Cache is used as envisioned.

Log Buffer #217, A Carnival of the Vanities for DBAs

Clouds are dispersing and the sun has started shining through. On the IT horizon, the cloud of Amazon has also dispersed and that is the biggest news of the previous week. Well clouds are elastic and they congregate and become solid after dispersion, and so Amazon will be fine too. And our blogosphere is fine too and here is the latest report about them in this week’s edition Log Buffer #217.

What’s in your Exadata Smart Flash Cache?

Unfortunately, there is no easy way to monitor what’s in the Smart Flash Cache. Oracle only provided a “list flashcachecontent” command in the cellcli tool, it has no summarization options, and only displays object numbers. So I wrote this handy tool which lets you query the cell flash content on all cells, similarly, you can query the buffer cache (db_cache) contents in v$bh.

Page 70 of 203« First...102030...6869707172...8090100...Last »