| From: | Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | pgsql-committers(at)postgresql(dot)org |
| Subject: | Re: pgsql: Pull up isReset flag from AllocSetContext to MemoryContext struc |
| Date: | 2011-05-25 05:22:03 |
| Message-ID: | 4DDC91FB.7040008@enterprisedb.com |
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| Thread: | |
| Lists: | pgsql-committers |
On 25.05.2011 00:58, Tom Lane wrote:
> Heikki Linnakangas<heikki(dot)linnakangas(at)enterprisedb(dot)com> writes:
>> On 22.05.2011 21:18, Tom Lane wrote:
>>> I'm also concerned that you've probably
>>> added cycles on net to MemoryContextAlloc (where it's no longer possible
>>> to tail-call AllocSetAlloc), which could very easily cost more cycles on
>>> most workloads than could ever be saved by making MemoryContextReset a
>>> shade faster.
>
>> Good point. That would be solved by clearing the flag before the
>> AllocSetAlloc() call. I don't see any harm in clearing the flag before
>> actually doing the allocation.
>
> Done that way.
Ok, thanks.
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com
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