94 lines
3.0 KiB
Plaintext
94 lines
3.0 KiB
Plaintext
DROP TABLE IF EXISTS tab2;
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SHOW variables like '%innodb_checksum_algorithm%';
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Variable_name Value
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innodb_checksum_algorithm crc32
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SELECT @@default_storage_engine;
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@@default_storage_engine
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InnoDB
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CREATE TABLE tab2(col_1 CHAR (255) ,
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col_2 VARCHAR (255), col_3 longtext,
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col_4 longtext,col_5 BLOB,
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col_6 LONGBLOB , col_7 bigint)
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engine = innodb ;
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CREATE INDEX idx1 ON tab2(col_3(10));
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CREATE INDEX idx2 ON tab2(col_4(10));
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CREATE INDEX idx3 ON tab2(col_5(10));
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# Generate a input text file for loading the table
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# check whether file exist
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# load the data into the table
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SELECT COUNT(*) FROM tab2;
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COUNT(*)
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7014000
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# Stop the server
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# Rewrite the tab2.ibd file into new checksum=CRC32
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# Restart the DB server with default innodb_checksum_algorithm=InnoDB (Default)
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# no need to pass to the server.
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# Load the with repeat function
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SET @col_1 = repeat('A', 5);
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SET @col_2 = repeat('B', 20);
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SET @col_3 = repeat('D', 100);
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SET @col_4 = repeat('E', 100);
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SET @col_5 = repeat('F', 100);
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SET @col_6 = repeat('G', 100);
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# Check the table status with DML
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INSERT INTO tab2(col_1,col_2,col_3,col_4,col_5,col_6,col_7)
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VALUES (@col_1,@col_2,@col_3,@col_4,@cl_5,@col_6,1000);
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# Check with Read operation by record count
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SELECT COUNT(*) FROM tab2 where col_7=1000;
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COUNT(*)
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1
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# Stop the server
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# Rewrite the tab2.ibd file into new checksum=None
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# Check the page type summary with longform for *.ibd
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File::tab#.ibd
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================PAGE TYPE SUMMARY==============
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#PAGE_COUNT PAGE_TYPE
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===============================================
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# Index page
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# SDI Index page
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# Undo log page
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# Inode page
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# Insert buffer free list page
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# Freshly allocated page
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# Insert buffer bitmap
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# System page
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# Transaction system page
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# File Space Header
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# Extent descriptor page
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# BLOB page
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# Compressed BLOB page
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# Subsequent Compressed BLOB page
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# SDI BLOB page
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# Compressed SDI BLOB page
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# Other type of page
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===============================================
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Additional information:
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Undo page type: # insert, # update, # other
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Undo page state: # active, # cached, # to_free, # to_purge, # prepared, # other
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# Page type dump for tab2.ibd
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# check whether dump.txt file exist
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# Restart the DB server with default innodb_checksum_algorithm=CRC32
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SHOW variables like '%innodb_checksum_algorithm%';
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Variable_name Value
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innodb_checksum_algorithm crc32
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# Check the default engine is always InnoDB after restart
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SELECT @@default_storage_engine;
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@@default_storage_engine
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InnoDB
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# Load the with repeat function
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SET @col_1 = repeat('G', 5);
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SET @col_2 = repeat('H', 20);
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SET @col_3 = repeat('I', 100);
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SET @col_4 = repeat('J', 100);
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SET @col_5 = repeat('K', 100);
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SET @col_6 = repeat('L', 100);
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# Check the table status with DML
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INSERT INTO tab2(col_1,col_2,col_3,col_4,col_5,col_6,col_7)
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VALUES (@col_1,@col_2,@col_3,@col_4,@cl_5,@col_6,2000);
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# Check with Read operation that record count
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SELECT COUNT(*) FROM tab2 where col_7=2000;
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COUNT(*)
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1
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DROP TABLE IF EXISTS tab2;
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