Re: [Postgres-xc-general] Failed to get pooled connection

You can try pgxc_pool_reload() and pgxc_pool_check() as found at
http://postgres-xc.sourceforge.net/docs/1_0_2/functions-admin.html

Another means is CLEAN CONNECTION statement,
http://postgres-xc.sourceforge.net/docs/1_0_2/sql-cleanconnection.html

Regards;
----------
Koichi Suzuki


2013/3/21 Chris Brown <cb...@in...>:
> Hi all,
>
> I have previously run successful tests with 2 datanodes and I'm trying to
> run the same test with 3 datanodes.  I am able to create/drop tables and
> insert/select rows from all 3 coordinators.  The test runs if I point it
> at a single coordinator (doesn't matter which one) and set the number of
> clients to 32.  Each datanode box is running
> datanode+coordinator(master)+gtm_proxy and gtm is running on a 4th box.
>
> I have upped max_pool_size on the coordinator and max_connections on the
> datanode to 400.  I haven't upped max_prepared_transactions however I
> don't think any of these single-row-and-table inserts will required a
> prepared transaction unless _all_ transactions use them (do they? And if
> they do, why does my 2-datanode test work?).
>
>
> Problem 1: If I use a single client, inserts seem to get stuck after about
> 12 (running a batch file with 6014 individual insert statements).  The
> process doing inserts (psql) just stops doing inserts and I don't see any
> output anywhere.
>
> Problem 2: If I use 64 clients connecting to all 3 coordinators (round
> robin so approx. 21 clients each) I get 'Failed to get pooled connection'
> errors.
>
> Problem 3: If I get 'Failed to get pooled connection' errors, the cluster
> is in a broken state from then on.  The only solution I've found is to
> dropdb then createdb which usually can't be accomplished without stopping
> the entire cluster and restarting it.
>
> What am I doing wrong?
>
> Chris...
>
>
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