After installing Magento 2.2.2 when I check my error log I get this warning.

Memory size allocated for the temporary table is more than 20% of innodb_buffer_pool_size. Please update innodb_buffer_pool_size or decrease batch size value (which decreases memory usages for the temporary table). Current batch size: 100000; Allocated memory size: 50000000 bytes; InnoDB buffer pool size: 134217728 bytes.

Where the error is saying memory size allocated for the temporary table is more than 20%. Which temporary table is it referencing to? How should I resolve it?


7 Answers 7


Magento can increase the memory for processing a large amount of data by using memory engines instead of InnoDB. The algorithm increases the memory value for the max_heap_table_size and tmp_table_size MySQL parameters.

When the allocated memory size for a temporary table will be greater than 20% of innodb_buffer_pool_size, the error message is written to the Magento log.

To prevent this error message, you need to update default Batching configuration of catalog_category_product (Category Products) indexer because "Current batch size: 100000".

For more details, take a look here.

  • It says we have to change innodb_buffer_pool_size but it does not explain how!
    – Black
    Dec 29, 2021 at 9:53
  • Go to your server MySQL settings file (my.ini)
  • Search for innodb_buffer_pool_size and increase this value.
  • 2
    where do i locate the mySQL setting file (my.ini)? thanks Jun 1, 2019 at 0:50
  • is there a way to config this in project level, and not on mysql?
    – rafaelphp
    Jun 9, 2019 at 20:07

Try to update the value for batchRowsCount to 10000 in {Your_Module_Name}/etc/di.xml file of catalog_category_product (Category Products) indexer Magento\Catalog\Model\Indexer\Category\Product\Action\Full

   <type name="Magento\Catalog\Model\Indexer\Category\Product\Action\Full">
            <argument name="batchRowsCount" xsi:type="number">10000</argument>
            <argument name="batchSizeManagement" xsi:type="object">Magento\Catalog\Model\Indexer\CategoryProductBatchSize</argument>

The default innodb size is 128MB


Edit /etc/my.cnf and overwrite it to 512MB


Then restart MySQL. If you are unsure how, just kill it and wait for it to be restarted by your system:

killall mysqld

For updating the MySQL configuraiton file in my MAC OS Big Sur is in /usr/local/etc/my.cnf, it was installed using brew.

Add line in the my.cnf


save file and restart mysql using command

brew services restart mysql

Check if the setting is reflected correctly using this query in MySQL:

SHOW VARIABLES LIKE '%innodb_buffer_pool_size%'; 

The file is at /etc/my.cnf in root SSH, since the full path wasn't noted previously. Upon making any changes to /etc/my.cnf file, please restart MySQL for those changes to take effect

  • Search your my.cnf file by executing locate my.cnf (mine is under /etc/mysql/my.cnf)

  • Edit this file

  • Search for innodb_buffer_pool_size. If it does not exist then create it, e.g.


  • Restart the mysql service sudo service mysql restart

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