Changes between Version 20 and Version 21 of Performance


Ignore:
Timestamp:
Nov 4, 2013, 2:08:31 PM (11 years ago)
Author:
miracee
Comment:

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  • Performance

    v20 v21  
    160160* The Oversize Attribute Storage Technique
    161161* Used on variable length data types (e.g. varchar, text, bytea)
    162 ** PostgreSQL creates pg_toast_ tables here which are empty as long as data won't exceed page size
     162 * PostgreSQL creates pg_toast_ tables here which are empty as long as data won't exceed page size
    163163* If tuple exceeds page size (8 kB by default)
    164 ** data will get compressed
    165 ** data will be broken into multiple rows
     164 * data will get compressed
     165 * data will be broken into multiple rows
    166166
    167167== Size of RASBASE tables ==