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Re: Free Space Map data structure - Mailing list pgsql-hackers

From Heikki Linnakangas
Subject Re: Free Space Map data structure
Date
Msg-id 47FD065E.7030704@enterprisedb.com
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In response to Re: Free Space Map data structure  (Hannu Krosing <hannu@krosing.net>)
Responses Re: Free Space Map data structure  (Hannu Krosing <hannu@krosing.net>)
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Hannu Krosing wrote:
> Sabing 1 byte is an atomic op

Unfortunately, it's not. Most if not all modern CPUs will perform one 
byte modification as "load word" + "modify word" + "save word".

--   Heikki Linnakangas  EnterpriseDB   http://www.enterprisedb.com

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