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MySql Performance Optimization

MySql Performance Optimization

How large should be mysql innodbbufferpool_size?

Use this query:

SELECT CEILING(TotalInnoDBBytes*1.6/POWER(1024,3)) RIBPS FROM

(SELECT SUM(datalength+indexlength) TotalInnoDBBytes

FROM information_schema.tables WHERE engine='InnoDB') A;

This will give you the RIBPS, Recommended InnoDB Buffer Pool Size based on all InnoDB Data and Indexes with an additional 60%.

SELECT (PagesData*PageSize)/POWER(1024,3) DataGB FROM

(SELECT variable_value PagesData

FROM informationschema.globalstatus

WHERE variablename='Innodbbufferpoolpages_data') A,

(SELECT variable_value PageSize

FROM informationschema.globalstatus

WHERE variablename='Innodbpage_size') B;

This will give you how many actual GB of memory is in use by InnoDB Data in the InnoDB Buffer Pool at this moment.

This might also be useful:

SELECT engine, count() tables, concat(round(sum(table_rows)/1000000,2),'M') rows, concat(round(sum(data_length)/(102410241024),2),'G') data, concat(round(sum(index_length)/(102410241024),2),'G') idx, concat(round(sum(data_length+index_length)/(10241024*1024),2),'G') totalsize, round(sum(indexlength)/sum(data_length),2) idxfrac

FROM information_schema.TABLES GROUP BY engine

ORDER BY sum(datalength+indexlength) DESC LIMIT 10;