Log Message:
-----------
Fix using too many LWLocks bug, reported by Craig Ringer
<craig(at)postnewspapers(dot)com(dot)au>.
It was my mistake, I missed limitation of number of held locks, now GIN doesn't
use continiuous locks, but still hold buffers pinned to prevent interference
with vacuum's deletion algorithm.
Backpatch is needed.
Modified Files:
--------------
pgsql/src/backend/access/gin:
ginget.c (r1.13 -> r1.14)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/gin/ginget.c?r1=1.13&r2=1.14)
pgsql/src/include/access:
gin.h (r1.17 -> r1.18)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/access/gin.h?r1=1.17&r2=1.18)