| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Dave Cramer <davecramer(at)gmail(dot)com> |
| Cc: | PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: request for database identifier in the startup packet |
| Date: | 2024-05-09 16:22:37 |
| Message-ID: | CA+TgmobquXNxYLFk4e6QbtAe2fp+1U_Fj1TcL17O+U5OsxLCfA@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Thu, May 9, 2024 at 8:06 AM Dave Cramer <davecramer(at)gmail(dot)com> wrote:
> The JDBC driver is currently keeping a per connection cache of types in the driver. We are seeing cases where the number of columns is quite high. In one case Prevent fetchFieldMetaData() from being run when unnecessary. · Issue #3241 · pgjdbc/pgjdbc (github.com) 2.6 Million columns.
>
> If we knew that we were connecting to the same database we could use a single cache across connections.
>
> I think we would require a server/database identifier in the startup message.
I understand the desire to share the cache, but not why that would
require any kind of change to the wire protocol.
--
Robert Haas
EDB: http://www.enterprisedb.com
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