Re: Microvacuum support for Hash Index

Hi Jesper,

> Some initial comments.
>
> _hash_vacuum_one_page:
>
> + END_CRIT_SECTION();
> + _hash_chgbufaccess(rel, metabuf, HASH_READ, HASH_NOLOCK);
>
> The _hash_chgbufaccess() needs a comment.
>
> You also need a place where you call pfree for so->killedItems - maybe in
> hashkillitems().

Thanks for reviewing this patch. I would like to update you that this
patch has got dependency on a patch for concurrent hash index and WAL
log in hash index. So, till these two patches for hash index are not
stable I won't be able to share you a next version of patch for
supporting microvacuum in hash index.

With Regards,
Ashutosh Sharma
EnterpriseDB: http://www.enterprisedb.com