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Revise GIN README

author Alexander Korotkov <akorotkov@postgresql.org>

2019年11月19日 20:11:24 +0000 (23:11 +0300)

committer Alexander Korotkov <akorotkov@postgresql.org>

2019年11月19日 21:05:21 +0000 (00:05 +0300)

commit 287192bda245cbb7b7577d4c351822772b7e7373

tree 4a1219ad7d1e62a804394ef57c88f6c536cfb2fb tree

parent c0bf35421529ab210479ea0e828270e6626adff6 commit | diff

Revise GIN README

We find GIN concurrency bugs from time to time. One of the problems here is
that concurrency of GIN isn't well-documented in README. So, it might be even
hard to distinguish design bugs from implementation bugs.

This commit revised concurrency section in GIN README providing more details.
Some examples are illustrated in ASCII art.

Also, this commit add the explanation of how is tuple layout in internal GIN
B-tree page different in comparison with nbtree.

Discussion: https://postgr.es/m/CAPpHfduXR_ywyaVN4%2BOYEGaw%3DcPLzWX6RxYLBncKw8de9vOkqw%40mail.gmail.com
Author: Alexander Korotkov
Reviewed-by: Peter Geoghegan
Backpatch-through: 9.4

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