February 2018
Intermediate to advanced
510 pages
16h 10m
English
Content preview from MySQL 8 Administrator???s Guide
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myisampack - generating compressed, read-only MyISAM tables
This is a utility program that compresses MyISAM tables. It compresses each of the columns in tables separately and compresses the data file by about 40% to 70%.
MySQL preferably uses the mmap() function to do memory mapping on compressed tables; otherwise, it uses normal read/write file operations.
myisampack does not support partitioned tables.
Once tables are packed, they become read only.
Stopping the server and then going for compress tables is safe way to perform the compress operation.
Execution syntax for myisampack looks like the following block on the command line:
shell> myisampack [options] file_name ...
Specify the index file name with or without the .MYI file and also ...
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