| From: | Manfred Koizar <mkoi-pg(at)aon(dot)at> |
|---|---|
| To: | pgsql-patches(at)postgresql(dot)org |
| Subject: | Static snapshot data |
| Date: | 2003-05-09 16:10:18 |
| Message-ID: | cbjnbvo583gl265d6gqvse8g31r6o8720v@4ax.com |
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| Lists: | pgsql-hackers pgsql-patches |
Up to now, SerializableSnapshot and QuerySnapshot are malloc'ed and
free'd for every transaction or statement, respectively. This patch
puts these data structures into static memory, thus saving a few CPU
cycles and two malloc calls per transaction or (in isolation level
READ COMMITTED) per query.
Servus
Manfred
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