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    <p>InnoDB writes records to the transaction log (ib_logfile*) which are 512-byte aligned. It also writes information to the header of the first log. This is not configurable, but you can decrease the frequency of writes by changing the <a href="http://dev.mysql.com/doc/refman/5.6/en/innodb-parameters.html#sysvar_innodb_flush_log_at_trx_commit" rel="nofollow">innodb_flush_log_at_trx_commit</a> variable to 0.</p> <p>Then modified pages are written to disk in 16KB pages, regardless of whether you wrote just one 20-byte row on that page. In MySQL 5.6, you can reduce the page size with the <a href="http://dev.mysql.com/doc/refman/5.6/en/innodb-parameters.html#sysvar_innodb_page_size" rel="nofollow">innodb_page_size</a> variable, down to 4KB.</p> <p>Pages are also written to the doublewrite buffer before being written to the respective location in the tablespace. You can disable the doublewrite buffer with the <a href="http://dev.mysql.com/doc/refman/5.6/en/innodb-parameters.html#sysvar_innodb_doublewrite" rel="nofollow">innodb_doublewrite</a> variable.</p> <p>Pages may also be written to the rollback segment. This is not configurable.</p> <p>There's also the binary log. This is not related to InnoDB specifically, it is used for any storage engine. I assume you have no need for the binary log if you're on a Raspberry Pi. You can disable the binary log with the <a href="http://dev.mysql.com/doc/refman/5.6/en/replication-options-binary-log.html#sysvar_log_bin" rel="nofollow">log_bin</a> variable (just don't set this variable, and the default condition is that it's disabled).</p> <p>You can also disable the general query log and the slow query log. </p> <p>There's also an error log, but you can't disable that.</p>
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