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> All large objects are placed in a single system table called
<CODE
CLASS="CLASSNAME"
>pg_largeobject</CODE
>.
<SPAN
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> also supports a storage system called
<SPAN
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>"<ACRONYM
CLASS="ACRONYM"
>TOAST</ACRONYM
>"</SPAN
> that automatically stores values
larger than a single database page into a secondary storage area per table.
This makes the large object facility partially obsolete. One
remaining advantage of the large object facility is that it allows values
up to 2 GB in size, whereas <ACRONYM
CLASS="ACRONYM"
>TOAST</ACRONYM
>ed fields can be at
most 1 GB. Also, large objects can be randomly modified using a read/write
API that is more efficient than performing such operations using
<ACRONYM
CLASS="ACRONYM"
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>.
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