[Pgpool-general] Current problems in pgpool2.1b2+segfault patch

[Nico -telmich- Schottelius]

Hello!

Currently I had to disable pgpool, because of the following problems:

- no real logging support

- too often disconnects: 

2008-05-30 09:45:19 LOG:   pid 15208: statement: begin; select data from php_sessions where session_id = 'cd4752abe
216370eeec09e8dde9354f7' for update; 
2008-05-30 09:45:19 LOG:   pid 15252: statement: begin; select data from php_sessions where session_id = '87df8fc96
924eba9999f2aceb3dfbd5b' for update; 
2008-05-30 09:45:19 LOG:   pid 14567: statement:  RESET ALL
2008-05-30 09:45:19 LOG:   pid 14567: statement:  SET SESSION AUTHORIZATION DEFAULT
2008-05-30 09:45:19 ERROR: pid 15252: pool_process_query: 1 th kind C does not match with master connection kind D
2008-05-30 09:45:19 LOG:   pid 15252: notice_backend_error: 1 fail over request from pid 15252
2008-05-30 09:45:19 LOG:   pid 5045: starting degeneration. shutdown host 62.65.130.180(6543)

There are just too many situations, when a node is disconnected

- problems on syncing, even with PITR: As the applications do not release the connection
  from pgpool, the pgp_recovery_node only works if I restart pgpool and insert
  an iptables -j REJECT to the right port before the whole sync
   -> more downtime than just for PITR

- connection problems when one backend is down / the available connections
  at the backends are full: no answer from pgpool

- no / wrong reuse of existing connections: pgpool opens up to the maximum number
  of connections persistent to the backends, but does NOT reuse them until all
  are opened (afaics) -> leads to strange behaviour if the last made connections
  (see above)

Currently I just setup a BIG server instead of a cluster with a cold-standby node.

If I see imrovements in pgpool I'll give it a try again, but the pgpool-II 2.1b2
version is not usable yet.

Sincerly

Nico

-- 
Think about Free and Open Source Software (FOSS).
http://nico.schottelius.org/documentations/foss/the-term-foss/

PGP: BFE4 C736 ABE5 406F 8F42  F7CF B8BE F92A 9885 188C
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