On 01/28/2016 08:30 AM, Tignor, Tom wrote:
>
> Hello slony folks,
> From my reading I’m guessing (hoping) this isn’t a new problem. I have
> a simple cluster with one provider replicating to three subscribers. The
> provider’s changelog tables (sl_log_[1|2]) are fine, but the subscribers
> (with forwarding enabled) are all showing runaway growth. Looked through
> the FAQ and I don’t see the node I dropped or any idle transactions as
> viable culprits. Are there other thoughts on the cause? Can I safely
> manually delete/truncate some/all of the changelog tables? These
> replicas are all leaf nodes. I only have forwarding turned on to allow
> for failover, and my replication rate is the 2 sec default.
> Thanks in advance for any insights.
What is the output of the sl_status view "on those leaf nodes"?
>
> ams=# select
> pg_size_pretty(pg_total_relation_size('_ams_cluster.sl_log_1'));
>
> pg_size_pretty
>
> ----------------
>
> 75 MB
>
> (1 row)
>
>
> ams=# select
> pg_size_pretty(pg_total_relation_size('_ams_cluster.sl_log_2'));
>
> pg_size_pretty
>
> ----------------
>
> 34 GB
>
> (1 row)
>
>
> ams=# select * from _ams_cluster.sl_confirm where con_origin not in
> (select no_id from _ams_cluster.sl_node) or con_received not in (select
> no_id from _ams_cluster.sl_node);
>
> con_origin | con_received | con_seqno | con_timestamp
>
> ------------+--------------+-----------+---------------
>
> (0 rows)
>
>
> ams=# select * from pg_stat_activity where current_query like '%IDLE%';
>
> datid | datname | procpid | usesysid | usename |
> application_name | client_addr | client_hostname | client_port |
> backend_start | xact_start |
> query_start | waiting |
>
> current_query
>
> -------+---------+---------+----------+------------+---------------------------+----------------+-----------------+-------------+-------------------------------+-------------------------------+-------------------------------+---------+---
>
> ----------------------------------------------------------------
>
> 16393 | ams | 2611 | 212995 | ams_viewer |
> | 88.221.209.10 | | 43328 | 2016-01-28
> 12:24:49.706389+00 | | 2016-01-28
> 13:18:02.427848+00 | f | <I
>
> DLE>
>
> 16393 | ams | 12894 | 212995 | ams_viewer |
> | 88.221.209.10 | | 60112 | 2016-01-28
> 12:47:26.230681+00 | | 2016-01-28
> 13:15:27.744242+00 | f | <I
>
> DLE>
>
> 16393 | ams | 12884 | 212995 | ams_viewer |
> | 88.221.209.10 | | 44302 | 2016-01-28
> 12:47:25.100006+00 | | 2016-01-28
> 13:15:27.936059+00 | f | <I
>
> DLE>
>
> 16393 | ams | 23466 | 213867 | ams_slony | psql
> | | | -1 | 2016-01-28
> 13:11:32.030343+00 | 2016-01-28 13:18:37.283992+00 | 2016-01-28
> 13:18:37.283992+00 | f | se
>
> lect * from pg_stat_activity where current_query like '%IDLE%';
>
> 16393 | ams | 6719 | 213867 | ams_slony |
> slon.origin_2_provider_2 | 60.254.150.133 | |
> 61806 | 2016-01-22 01:59:14.800129+00 | |
> 2016-01-28 13:18:25.935111+00 | f | <I
>
> DLE>
>
> 16393 | ams | 6718 | 213867 | ams_slony |
> slon.origin_3_provider_2 | 60.254.150.133 | |
> 61805 | 2016-01-22 01:59:14.797655+00 | |
> 2016-01-28 13:18:34.304475+00 | f | <I
>
> DLE>
>
> 16393 | ams | 5505 | 213867 | ams_slony |
> slon.origin_4_provider_2 | 80.67.75.105 | |
> 36477 | 2016-01-22 01:56:25.637046+00 | |
> 2016-01-28 13:18:36.1348+00 | f | <I
>
> DLE>
>
> 16393 | ams | 5504 | 213867 | ams_slony |
> slon.origin_3_provider_2 | 72.246.50.22 | |
> 51813 | 2016-01-22 01:56:25.240798+00 | |
> 2016-01-28 13:18:28.961629+00 | f | <I
>
> DLE>
>
> 16393 | ams | 5487 | 213867 | ams_slony |
> slon.origin_4_provider_2 | 72.246.50.22 | |
> 51803 | 2016-01-22 01:56:22.896388+00 | |
> 2016-01-28 13:18:35.858913+00 | f | <I
>
> DLE>
>
> 16393 | ams | 5047 | 213867 | ams_slony |
> slon.origin_2_provider_2 | 72.246.50.22 | |
> 51564 | 2016-01-22 01:55:23.600296+00 | |
> 2016-01-28 13:18:34.487192+00 | f | <I
>
> DLE>
>
> 16393 | ams | 5041 | 213867 | ams_slony |
> slon.origin_2_provider_2 | 80.67.75.105 | |
> 36402 | 2016-01-22 01:55:22.964462+00 | |
> 2016-01-28 13:18:34.519066+00 | f | <I
>
> DLE>
>
> 16393 | ams | 6694 | 213867 | ams_slony |
> slon.node_2_listen | 60.254.150.133 | |
> 61795 | 2016-01-22 01:59:12.095052+00 | |
> 2016-01-28 13:18:27.928384+00 | f | <I
>
> DLE>
>
> 16393 | ams | 4456 | 213867 | ams_slony |
> slon.node_2_listen | 72.246.50.22 | |
> 51238 | 2016-01-22 01:54:21.481355+00 | |
> 2016-01-28 13:18:36.766973+00 | f | <I
>
> DLE>
>
> 16393 | ams | 4457 | 213867 | ams_slony |
> slon.node_2_listen | 80.67.75.105 | |
> 36333 | 2016-01-22 01:54:21.500456+00 | |
> 2016-01-28 13:18:36.204482+00 | f | <I
>
> DLE>
>
> 16393 | ams | 4428 | 213867 | ams_slony |
> slon.local_monitor | | |
> -1 | 2016-01-22 01:54:18.977015+00 | |
> 2016-01-28 13:18:36.652567+00 | f | <I
>
> DLE>
>
> 16393 | ams | 4427 | 213867 | ams_slony | slon.local_sync
> | | | -1 | 2016-01-22
> 01:54:18.976932+00 | | 2016-01-28
> 13:18:36.151998+00 | f | <I
>
> DLE>
>
> 16393 | ams | 4426 | 213867 | ams_slony |
> slon.local_cleanup | | |
> -1 | 2016-01-22 01:54:18.976842+00 | |
> 2016-01-28 13:12:12.582921+00 | f | <I
>
> DLE>
>
> 16393 | ams | 4425 | 213867 | ams_slony |
> slon.remoteWorkerThread_4 | | |
> -1 | 2016-01-22 01:54:18.976783+00 | |
> 2016-01-28 13:18:33.99715+00 | f | <I
>
> DLE>
>
> 16393 | ams | 4420 | 213867 | ams_slony |
> slon.remoteWorkerThread_1 | | |
> -1 | 2016-01-22 01:54:18.976548+00 | |
> 2016-01-28 13:18:33.561531+00 | f | <I
>
> DLE>
>
> 16393 | ams | 4419 | 213867 | ams_slony |
> slon.remoteWorkerThread_3 | | |
> -1 | 2016-01-22 01:54:18.97647+00 | |
> 2016-01-28 13:18:34.808907+00 | f | <I
>
> DLE>
>
> 16393 | ams | 4413 | 213867 | ams_slony | slon.local_listen
> | | | -1 | 2016-01-22
> 01:54:18.965568+00 | | 2016-01-28
> 13:18:37.096159+00 | f | <I
>
> DLE>
>
> (21 rows)
>
>
> ams=#
>
>
>
> Tom :-)
>
>
>
>
> _______________________________________________
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>
--
Jan Wieck
Senior Software Engineer
http://slony.info
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