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Researching your MySQL table sizes

 | March 17, 2008 |  Posted In: Insight for DBAs

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I posted a simple INFORMATION_SCHEMA query to find largest tables last month and it got a good response. Today I needed little modifications to that query to look into few more aspects of data sizes so here it goes:

Find total number of tables, rows, total data in index size for given MySQL Instance

Find the same data using some filter
I often use similar queries to find space used by particular table “type” in sharded environment when multiple tables with same structure and similar name exists:

Find biggest databases

Data Distribution by Storage Engines
You can change this query a bit and get most popular storage engines by number of tables or number of rows instead of data stored.

Trivial but handy.

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Peter Zaitsev

Peter managed the High Performance Group within MySQL until 2006, when he founded Percona. Peter has a Master's Degree in Computer Science and is an expert in database kernels, computer hardware, and application scaling.

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