| From: | Dilip Kumar <dilipbalaut(at)gmail(dot)com> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Petr Jelinek <petr(at)2ndquadrant(dot)com>, Jim Nasby <Jim(dot)Nasby(at)bluetreble(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Andres Freund <andres(at)2ndquadrant(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Relation extension scalability |
| Date: | 2016-03-30 02:54:27 |
| Message-ID: | CAFiTN-tnLe=Nr2SerQBv1UWEAr698nCviVPqBYoY3HmWSgy3pg@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Wed, Mar 30, 2016 at 7:51 AM, Dilip Kumar <dilipbalaut(at)gmail(dot)com> wrote:
> + if (lockWaiters)
> + /*
> + * Here we are using same freespace for all the Blocks, but that
> + * is Ok, because all are newly added blocks and have same freespace
> + * And even some block which we just added to FreespaceMap above, is
> + * used by some backend and now freespace is not same, will not harm
> + * anything, because actual freespace will be calculated by user
> + * after getting the page.
> + */
> + UpdateFreeSpaceMap(relation, firstBlock, blockNum, freespace);
>
>
> Does this look good ?
Done in better way..
+ lockWaiters = RelationExtensionLockWaiterCount(relation);
+
+ if (lockWaiters == 0)
+ return;
+
--
Regards,
Dilip Kumar
EnterpriseDB: http://www.enterprisedb.com
| Attachment | Content-Type | Size |
|---|---|---|
| multi_extend_v21.patch | application/octet-stream | 12.2 KB |
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