Wed Apr 4 08:30:11 PDT 2012
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Steve Thanks to reply This is for the process with pid 25021 Without joining and using the following query I see the tablenames (the 14 first lines) biopacs_production=# select locktype, relation::regclass as relname,mode,granted from pg_locks where transaction is not null and pid=25021 order by relname limit 14; locktype | relname | mode | granted ----------+------------------------------------------------------------------------------+-----------------+--------- relation | pg_class | AccessShareLock | t relation | pg_namespace | AccessShareLock | t relation | pg_class_oid_index | AccessShareLock | t relation | _sysrep._unittesting_key_seq | AccessShareLock | t relation | _sysrep.sequence_test | AccessShareLock | t relation | globaldata."Address_AddressID_seq" | AccessShareLock | t relation | globaldata."AnonymizationRuleAssociation_AnonymizationRuleAssociationID_seq" | AccessShareLock | t relation | globaldata."AnonymizationRule_AnonymizationRuleID_seq" | AccessShareLock | t relation | globaldata."Attachment_AttachmentID_seq" | AccessShareLock | t relation | globaldata."AuditAddress_ID_seq" | AccessShareLock | t relation | globaldata."AuditAnonymizationRule_ID_seq" | AccessShareLock | t relation | globaldata."AuditAnonymizationRuleAssociation_ID_seq" | AccessShareLock | t relation | globaldata."AuditAttachment_ID_seq" | AccessShareLock | t relation | globaldata."AuditAttachmentLocation_ID_seq" | AccessShareLock | t (14 rows) ________________________________ De : Steve Singer <ssinger at ca.afilias.info> À : David TECHER <davidtecher at yahoo.fr> Cc : Slony Hackers <slony1-hackers at lists.slony.info> Envoyé le : Mercredi 4 avril 2012 17h25 Objet : Re: [Slony1-hackers] CreateEvent and Lokcs on replicated objects On 12-04-04 06:25 AM, David TECHER wrote: > Hi I can't think of an obvious reason why a generic SYNC event would get a lock on all of your tables. I don't think the SYNC event looks at replicated tables . What transactions are holding the locks? You should be able to see this in your pg_locks output (joining back to pg_class to get the tablenames from the oids) > > I am using Slony 1.2.22 > > I've noticed that when a CreateEvent occurs > > biopacs_production=# select * from pg_stat_activity where procpid=25021; > datid | datname | procpid | usesysid | usename | current_query | waiting > | query_start | backend_start | client_addr | client_port > -------+--------------------+---------+----------+--------------+----------------------------------------------------------------+---------+----------------------------------+----------------------------------+-------------+------------- > 16387 | biopacs_production | 25021 | 10 | enterprisedb | select > "_biocluster".createEvent('_biocluster', 'SYNC', NULL); | f | 04-APR-12 > 06:22:24.804654 -04:00 | 01-APR-12 06:53:33.363283 -04:00 | 127.0.1.1 | > 42050 > (1 row) > > > Then by querying pg_locks I've noticed that there is a 'AccessSharelock' > on all replicated objects (tables and sequences). > > It is normal? > > Since our database used intensive CPU (high load) I asked myself if it > could explained my issue. > > Thanks for letting me know. > > Kind regards. > > David. > > > > _______________________________________________ > Slony1-hackers mailing list > Slony1-hackers at lists.slony.info > http://lists.slony.info/mailman/listinfo/slony1-hackers -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.slony.info/pipermail/slony1-hackers/attachments/20120404/ad988d43/attachment.htm
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