34 lines
846 B
SQL
34 lines
846 B
SQL
#
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# Create and drop a table, larger than the buffer pool so that
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# everything else is evicted from it.
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#
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# Beware: Running this with big buffer pool is slow.
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#
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-- disable_query_log
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-- echo # Emptying InnoDB buffer pool: begin
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CREATE TABLE _big (a TEXT) ENGINE=INNODB;
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-- let $bp_size = `SELECT @@innodb_buffer_pool_size`
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-- echo # Buffer pool size: $bp_size bytes
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-- let $table_size = `SELECT ROUND($bp_size * 2.0)`
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-- echo # Creating and dropping a table with size: $table_size bytes
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-- let $row_size = 1024
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-- let $i = `SELECT ROUND($table_size / $row_size)`
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BEGIN;
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while ($i)
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{
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-- eval INSERT INTO _big VALUES (REPEAT('a', $row_size));
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dec $i;
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}
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COMMIT;
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-- disable_result_log
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SELECT * FROM _big WHERE a = 'find nothing';
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-- enable_result_log
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DROP TABLE _big;
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-- echo # Emptying InnoDB buffer pool: end
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-- enable_query_log
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