Re: [v9.1] sepgsql - userspace access vector cache

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Kohei KaiGai <kaigai(at)kaigai(dot)gr(dot)jp>
Cc: PgHacker <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: [v9.1] sepgsql - userspace access vector cache
Date: 2011-06-09 17:11:13
Message-ID: BANLkTim4TeKbpYbQWkqasftv=TA39DKBXQ@mail.gmail.com
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On Thu, Jun 9, 2011 at 12:39 PM, Kohei KaiGai <kaigai(at)kaigai(dot)gr(dot)jp> wrote:
> 2011/6/9 Robert Haas <robertmhaas(at)gmail(dot)com>:
>> On Thu, Jun 9, 2011 at 3:59 AM, Kohei KaiGai <kaigai(at)kaigai(dot)gr(dot)jp> wrote:
>>> The only modification by this patch to the core routine is a new
>>> syscache for pg_seclabel system catalog. The SECLABELOID enables to
>>> reference security label of the object using syscache interface.
>>
>> I believe we decided against that previously on the grounds that we
>> don't want to add syscaches that might get really really big.  In
>> particular, there could be a LOT of labelled large objects floating
>> around.
>>
> (Sorry, I missed to Cc: pgsql-hackers, so send again)
>
> As long as we use syscache mechanism to hold security label of
> relation or other cached objects, do you think it cause no troubles?

Maybe, but why do we need it?

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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