[ADMIN] Migration and snapshot of database
I want to migrate physical server on to virtual machine My physical server consist of 1. Some Application. 2. PostgreSQL Database Here the system migrated from Physical machine will be replicated into two VM's. - One will be act as live machine, on which live operations will be performed. - Second will be test VM, where I can make changes in application and test for new features. Both VM need to have their own database. But two copies of database require twice the storage. I want to optimize for storage. Once the database is migrated to new machine, how I can use this database for both VM's without two independent copies. Test VM will have its own write operations, which will be ignored later. My approach Migration: -I am thinking of using pg_basebackup for online database backup from physical machine to new machine. -Is pg_barman or pg_rman is faster than pg_basebackup? Storage optimization: I want to use snapshot to optimize for storage. - Will take snapshot of original database and export the snapshot with read/write access to test VM. Since, I could not found anything within postgres, I plan to do it using file system or LVM. So with this method I can do my testing and delete the snapshot after testing is done without reflecting original database. Has anyone work on such scenario? What are problem faced in writable snapshot?
[ADMIN] Migration and snapshot of database
I want to migrate physical server on to virtual machine My physical server consist of 1. Some Application. 2. PostgreSQL Database Here the system migrated from Physical machine will be replicated into two VM's. - One will be act as live machine, on which live operations will be performed. - Second will be test VM, where I can make changes in application and test for new features. Both VM need to have their own database. But two copies of database require twice the storage. I want to optimize for storage. Once the database is migrated to new machine, how I can use this database for both VM's without two independent copies. Test VM will have its own write operations, which will be ignored later. My approach Migration: -I am thinking of using pg_basebackup for online database backup from physical machine to new machine. -Is pg_barman or pg_rman is faster than pg_basebackup? Storage optimization: I want to use snapshot to optimize for storage. - Will take snapshot of original database and export the snapshot with read/write access to test VM. Since, I could not found anything within postgres, I plan to do it using file system or LVM. So with this method I can do my testing and delete the snapshot after testing is done without reflecting original database. Has anyone work on such scenario? What are problem faced in writable snapshot?
[ADMIN] Least intrusive way to move primary data
We're looking into options for the least intrusive way of moving our pg_data onto faster storage. The basic setup is as follows : 6 disk RAID-0 array of EBS volumes used for primary data storage 2 disk RAID-0 array of EBS volumes used for transaction logs RAID arrays are xfs It's the primary data volumes we'd like to switch onto a faster RAID array. The options I'm looking at are the following: - Setup new slave on similar hardware, do a normal master -> slave failover when it's ready. Upside, minimal downtime. Downside, quite a lot of work for something that's essentially just a copy of data - rsync the data storage to new RAID-0 array. stop Postgres. rsync again to apply changes. Change mount points and restart Postgres. Longer downtime but seems to be the most straight forward. - Go the full route of stopping Postgres, make consistent snapshots of all the volumes and recreate a new RAID-0 array from them and restarting. https://github.com/alestic/ec2-consistent-snapshot The rsync route sounds like the most straight-forward option, however I'm a little worried about it's consistency on a busy filesystem despite it being stopped when the second sync happens. Scripting the snapshotting, and reassembling of the RAID array sounds like the most reliable way of doing it and possibly the quickest as well. Any pitfalls, gotchas or suggestions for making the switch? Kind regards, Armand
[ADMIN] Standby doesn't chose a new timeline when promoted to master
Hi all, I am trying to set up Postgres 9.2 in HA mode. But i have noticed something strange happening with the xlogs being generated after a switch over. Problem: When a standby is promoted to master mode its not choosing a new timeline to work with. Can anyone please help me with the situations in which a standby doesn't chose a new timeline when promoted.. regards, Prakhar.
Re: [ADMIN] Least intrusive way to move primary data
Going with your first option, a master->slave replication, has the added benefit that you build the expertise for doing Continuous Point In Time Recovery, and after you do this storage system migration you can use that knowledge to put in a place a permanent standby server. Yes, it is a bit of work, but you'd kill two birds with one stone, and these are worthwhile birds. If you've got a busy server, and you want to do regular back-ups, and you don't have a much more expensive/sophisticated solution at your behest (or you want to support load balancing of reads in the future), this is probably something you want to do anyway. I don't see why your rsync option wouldn't work. Unless there is something about rsync that I don't know (and there might be), I would think that you would end up with consistent copies of the file systems, and so the question in my mind is whether the downtime for shutting down Postgres and doing a second rsync will be acceptable. If you go the "snapshot" route, the most important thing is ensuring that you're "crash consistent" across all volumes together. You'll want to make sure that whatever is implementing the snapshot can support lumping together all of the volumes into a management group of some sort. It's up to you to figure out the implementation details of whatever solution you're using. Just take care not to end up in a situation such that all of the intra-volume writes are consistent but the inter-volume writes are not, which would mean a corrupted Postgres. -- AWG On Thu, May 30, 2013 at 10:58:10AM +0200, Armand du Plessis wrote: > We're looking into options for the least intrusive way of moving our > pg_data onto faster storage. The basic setup is as follows : > > 6 disk RAID-0 array of EBS volumes used for primary data storage > 2 disk RAID-0 array of EBS volumes used for transaction logs > RAID arrays are xfs > > It's the primary data volumes we'd like to switch onto a faster RAID array. > > The options I'm looking at are the following: > >- Setup new slave on similar hardware, do a normal master -> slave >failover when it's ready. Upside, minimal downtime. Downside, quite a lot >of work for something that's essentially just a copy of data >- rsync the data storage to new RAID-0 array. stop Postgres. rsync again >to apply changes. Change mount points and restart Postgres. Longer downtime >but seems to be the most straight forward. >- Go the full route of stopping Postgres, make consistent snapshots of >all the volumes and recreate a new RAID-0 array from them and restarting. >https://github.com/alestic/ec2-consistent-snapshot > > The rsync route sounds like the most straight-forward option, however I'm a > little worried about it's consistency on a busy filesystem despite it being > stopped when the second sync happens. > > Scripting the snapshotting, and reassembling of the RAID array sounds like > the most reliable way of doing it and possibly the quickest as well. > > Any pitfalls, gotchas or suggestions for making the switch? > > Kind regards, > > Armand -- Sent via pgsql-admin mailing list (pgsql-admin@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin
[ADMIN] Change built-in default privileges for CREATE DATABASE?
Hello, when i CREATE a new DATABASE, its privileges column is empty (it's not the same case as it being '{}', which means no privileges). Empty column means: use built-in defaults. These defaults are: =c + owner=CTc How can I change these defaults so that after creation PUBLIC gets no rights? That is: remove '=c' from them. Here's a more detailed post on dba.SE: http://dba.stackexchange.com/questions/43387/change-built-in-default-privileges-in-postgresql Thanks, Michał. -- Sent via pgsql-admin mailing list (pgsql-admin@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin
Re: [ADMIN] Least intrusive way to move primary data
On Thu, May 30, 2013 at 12:19 PM, Andrew W. Gibbs wrote: > Going with your first option, a master->slave replication, has the > added benefit that you build the expertise for doing Continuous Point > In Time Recovery, and after you do this storage system migration you > can use that knowledge to put in a place a permanent standby server. > Yes, it is a bit of work, but you'd kill two birds with one stone, and > these are worthwhile birds. If you've got a busy server, and you want > to do regular back-ups, and you don't have a much more > expensive/sophisticated solution at your behest (or you want to > support load balancing of reads in the future), this is probably > something you want to do anyway. Thanks Andrew, actually I have a streaming slave running for backups at the moment. It's just not as powerful as the primary. It would probably actually be an option to upgrade it and do the failover as well.
[ADMIN] How do I know my table is bloated?
Hi, everyone. I saw some people talking about the reindex command and I read in the docs the one reason to use reindex is when a table is bloated. But how do I know when a table is bloated?
Re: [ADMIN] How do I know my table is bloated?
From: pgsql-admin-ow...@postgresql.org [mailto:pgsql-admin-ow...@postgresql.org] On Behalf Of Rodrigo Barboza Sent: Thursday, May 30, 2013 9:06 AM To: pgsql-admin@postgresql.org Subject: [ADMIN] How do I know my table is bloated? Hi, everyone. I saw some people talking about the reindex command and I read in the docs the one reason to use reindex is when a table is bloated. But how do I know when a table is bloated? You could use PGSTATTUPLE extension, which you could read about here: http://www.postgresql.org/docs/9.2/static/pgstattuple.html Regards, Igor Neyman -- Sent via pgsql-admin mailing list (pgsql-admin@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin
Re: [ADMIN] How do I know my table is bloated?
On Thu, May 30, 2013 at 11:16 AM, Igor Neyman wrote: > > > From: pgsql-admin-ow...@postgresql.org [mailto: > pgsql-admin-ow...@postgresql.org] On Behalf Of Rodrigo Barboza > Sent: Thursday, May 30, 2013 9:06 AM > To: pgsql-admin@postgresql.org > Subject: [ADMIN] How do I know my table is bloated? > > Hi, everyone. > I saw some people talking about the reindex command and I read in the docs > the one reason to use reindex is when a table is bloated. > But how do I know when a table is bloated? > > > You could use PGSTATTUPLE extension, which you could read about here: > > http://www.postgresql.org/docs/9.2/static/pgstattuple.html > > Regards, > Igor Neyman > Does auto-vaccum do the reindex process for us?
Re: [ADMIN] How do I know my table is bloated?
From: Rodrigo Barboza [mailto:rodrigombu...@gmail.com] Sent: Thursday, May 30, 2013 10:42 AM To: Igor Neyman Cc: pgsql-admin@postgresql.org Subject: Re: [ADMIN] How do I know my table is bloated? On Thu, May 30, 2013 at 11:16 AM, Igor Neyman wrote: From: pgsql-admin-ow...@postgresql.org [mailto:pgsql-admin-ow...@postgresql.org] On Behalf Of Rodrigo Barboza Sent: Thursday, May 30, 2013 9:06 AM To: pgsql-admin@postgresql.org Subject: [ADMIN] How do I know my table is bloated? Hi, everyone. I saw some people talking about the reindex command and I read in the docs the one reason to use reindex is when a table is bloated. But how do I know when a table is bloated? You could use PGSTATTUPLE extension, which you could read about here: http://www.postgresql.org/docs/9.2/static/pgstattuple.html Regards, Igor Neyman --Does auto-vaccum do the reindex process for us? No, autovacuum and reindexing are 2 completely different processes. Igor Neyman -- Sent via pgsql-admin mailing list (pgsql-admin@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin
Re: [ADMIN] How do I know my table is bloated?
Well, so I need to do reindex frequentely in database? Is that right? Or should I use cluster, as David said? How frequently should I do this operation? On Thu, May 30, 2013 at 11:49 AM, Igor Neyman wrote: > > > From: Rodrigo Barboza [mailto:rodrigombu...@gmail.com] > Sent: Thursday, May 30, 2013 10:42 AM > To: Igor Neyman > Cc: pgsql-admin@postgresql.org > Subject: Re: [ADMIN] How do I know my table is bloated? > > > > > On Thu, May 30, 2013 at 11:16 AM, Igor Neyman > wrote: > > > From: pgsql-admin-ow...@postgresql.org [mailto: > pgsql-admin-ow...@postgresql.org] On Behalf Of Rodrigo Barboza > Sent: Thursday, May 30, 2013 9:06 AM > To: pgsql-admin@postgresql.org > Subject: [ADMIN] How do I know my table is bloated? > > Hi, everyone. > I saw some people talking about the reindex command and I read in the docs > the one reason to use reindex is when a table is bloated. > But how do I know when a table is bloated? > > You could use PGSTATTUPLE extension, which you could read about here: > > http://www.postgresql.org/docs/9.2/static/pgstattuple.html > > Regards, > Igor Neyman > > > --Does auto-vaccum do the reindex process for us? > > No, autovacuum and reindexing are 2 completely different processes. > > Igor Neyman >
Re: [ADMIN] How do I know my table is bloated?
From: Rodrigo Barboza [mailto:rodrigombu...@gmail.com] Sent: Thursday, May 30, 2013 11:10 AM To: Igor Neyman Cc: pgsql-admin@postgresql.org Subject: Re: [ADMIN] How do I know my table is bloated? Well, so I need to do reindex frequentely in database? Is that right? Or should I use cluster, as David said? How frequently should I do this operation? - Not necessarily. If there is no table or index bloat, which you should be able to check first, - why bother? Normally autovacuum does pretty good job even with default configuration parameters. If not, you could start with adjusting autovacuum parameters. And reindex only as a last resort, when your index size grows "uncontrollably". Igor Neyman -- Sent via pgsql-admin mailing list (pgsql-admin@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin
Re: [ADMIN] How do I know my table is bloated?
I have some tables that I do a lot of updates, deletes and inserts. So I am worried that my cluster can grow up to a huge size... The best option would be to create a scheduled process to check if it is bloated and if so, reindex? On Thu, May 30, 2013 at 12:17 PM, Igor Neyman wrote: > > > From: Rodrigo Barboza [mailto:rodrigombu...@gmail.com] > Sent: Thursday, May 30, 2013 11:10 AM > To: Igor Neyman > Cc: pgsql-admin@postgresql.org > Subject: Re: [ADMIN] How do I know my table is bloated? > > Well, so I need to do reindex frequentely in database? Is that right? > Or should I use cluster, as David said? > How frequently should I do this operation? > > - > > Not necessarily. > If there is no table or index bloat, which you should be able to check > first, - why bother? > > Normally autovacuum does pretty good job even with default configuration > parameters. > If not, you could start with adjusting autovacuum parameters. > And reindex only as a last resort, when your index size grows > "uncontrollably". > > Igor Neyman >
Re: [ADMIN] How do I know my table is bloated?
From: Rodrigo Barboza [mailto:rodrigombu...@gmail.com] Sent: Thursday, May 30, 2013 12:04 PM To: Igor Neyman Cc: pgsql-admin@postgresql.org Subject: Re: [ADMIN] How do I know my table is bloated? I have some tables that I do a lot of updates, deletes and inserts. So I am worried that my cluster can grow up to a huge size... The best option would be to create a scheduled process to check if it is bloated and if so, reindex? -- Depends on whether it's table bloat or index bloat. But first, you try to minimize bloat by tuning autovacuum. Igor Neyman -- Sent via pgsql-admin mailing list (pgsql-admin@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin
Re: [ADMIN] Change built-in default privileges for CREATE DATABASE?
Answered by Peter Eisentraut here: http://dba.stackexchange.com/a/43435/24360 Thanks, Michał. On Thu, May 30, 2013 at 12:24 PM, Michał Rus wrote: > Hello, > > when i CREATE a new DATABASE, its privileges column is empty (it's not > the same case as it being '{}', which means no privileges). Empty > column means: use built-in defaults. These defaults are: > > =c + owner=CTc > > How can I change these defaults so that after creation PUBLIC gets no > rights? That is: remove '=c' from them. > > Here's a more detailed post on dba.SE: > > http://dba.stackexchange.com/questions/43387/change-built-in-default-privileges-in-postgresql > > Thanks, > Michał. -- Sent via pgsql-admin mailing list (pgsql-admin@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin
Re: [ADMIN] How do I know my table is bloated?
On Thu, May 30, 2013 at 1:35 PM, Igor Neyman wrote: > > > From: Rodrigo Barboza [mailto:rodrigombu...@gmail.com] > Sent: Thursday, May 30, 2013 12:04 PM > To: Igor Neyman > Cc: pgsql-admin@postgresql.org > Subject: Re: [ADMIN] How do I know my table is bloated? > > I have some tables that I do a lot of updates, deletes and inserts. > So I am worried that my cluster can grow up to a huge size... > The best option would be to create a scheduled process to check if it is > bloated and if so, reindex? > > -- > > Depends on whether it's table bloat or index bloat. > But first, you try to minimize bloat by tuning autovacuum. > > Igor Neyman > > I am using the defualt values for autovaccum. How do you suggest to tune the autovacuum? If the problem is index bloat, autovaccum won't be a solution, am I right?
Re: [ADMIN] How do I know my table is bloated?
From: Rodrigo Barboza [mailto:rodrigombu...@gmail.com] Sent: Thursday, May 30, 2013 2:24 PM To: Igor Neyman Cc: pgsql-admin@postgresql.org Subject: Re: [ADMIN] How do I know my table is bloated? I am using the defualt values for autovaccum. How do you suggest to tune the autovacuum? If the problem is index bloat, autovaccum won't be a solution, am I right? -- Rodrigo, I think you are putting "a cart in front of the horse" (so to speak). Did you verify that you have bloated indexes? Under normal conditions it shouldn't happen. >From docs (http://www.postgresql.org/docs/9.2/static/routine-reindex.html): "B-tree index pages that have become completely empty are reclaimed for re-use. However, there is still a possibility of inefficient use of space: if all but a few index keys on a page have been deleted, the page remains allocated. Therefore, a usage pattern in which most, but not all, keys in each range are eventually deleted will see poor use of space." So, yes, if index is really gets bloated than reindexing fixes this problem. Igor Neyman -- Sent via pgsql-admin mailing list (pgsql-admin@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin
Re: [ADMIN] How do I know my table is bloated?
On Thu, May 30, 2013 at 3:36 PM, Igor Neyman wrote: > > > From: Rodrigo Barboza [mailto:rodrigombu...@gmail.com] > Sent: Thursday, May 30, 2013 2:24 PM > To: Igor Neyman > Cc: pgsql-admin@postgresql.org > Subject: Re: [ADMIN] How do I know my table is bloated? > > > I am using the defualt values for autovaccum. > How do you suggest to tune the autovacuum? > If the problem is index bloat, autovaccum won't be a solution, am I right? > > -- > > Rodrigo, > > I think you are putting "a cart in front of the horse" (so to speak). > Did you verify that you have bloated indexes? Under normal conditions it > shouldn't happen. > From docs (http://www.postgresql.org/docs/9.2/static/routine-reindex.html > ): > "B-tree index pages that have become completely empty are reclaimed for > re-use. However, there is still a possibility of inefficient use of space: > if all but a few index keys on a page have been deleted, the page remains > allocated. Therefore, a usage pattern in which most, but not all, keys in > each range are eventually deleted will see poor use of space." > > So, yes, if index is really gets bloated than reindexing fixes this > problem. > > Igor Neyman > Well, maybe I am. But I am worried because I know that there are some tables that do lots of updates and delete. As this concept is new for me, I am trying to be prepared to detect a situation like this.
Re: [ADMIN] How do I know my table is bloated?
From: Rodrigo Barboza [mailto:rodrigombu...@gmail.com] Sent: Thursday, May 30, 2013 2:50 PM To: Igor Neyman Cc: pgsql-admin@postgresql.org Subject: Re: [ADMIN] How do I know my table is bloated? Well, maybe I am. But I am worried because I know that there are some tables that do lots of updates and delete. As this concept is new for me, I am trying to be prepared to detect a situation like this. -- It all depends on pattern of your inserts/updates/deletes. If your index accumulates lots of almost (but not completely) empty pages with just few entries left, than - yes, REINDEX "is your friend". b.t.w., this concept is not unique to Postgres, it's just a nature of B-tree indexes. Igor -- Sent via pgsql-admin mailing list (pgsql-admin@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin
Re: [ADMIN] How do I know my table is bloated?
On Thu, May 30, 2013 at 3:55 PM, Igor Neyman wrote: > > > From: Rodrigo Barboza [mailto:rodrigombu...@gmail.com] > Sent: Thursday, May 30, 2013 2:50 PM > To: Igor Neyman > Cc: pgsql-admin@postgresql.org > Subject: Re: [ADMIN] How do I know my table is bloated? > > Well, maybe I am. > But I am worried because I know that there are some tables that do lots of > updates and delete. > As this concept is new for me, I am trying to be prepared to detect a > situation like this. > > -- > It all depends on pattern of your inserts/updates/deletes. > If your index accumulates lots of almost (but not completely) empty pages > with just few entries left, than - yes, REINDEX "is your friend". > > b.t.w., this concept is not unique to Postgres, it's just a nature of > B-tree indexes. > > Igor > I see... I guess the only way to know is if I suspect that size of my db is growing unexpected. But it is good to know that a b-tree concept concept. Because I came from a very old mysql installation (that is way postgres is new for me) and I am trying to keep my postgres the most stable possible.
Re: [ADMIN] Output of pg_controldata
Hi I want to know the meaning of these fields specifically : *Latest checkpoint location: 0/5F20* *Prior checkpoint location:0/5E20* *Latest checkpoint's REDO location:0/5F20* * * *Latest checkpoint's NextXID: 0/1894* * * *Latest checkpoint's NextMultiXactId: 1* *Latest checkpoint's NextMultiOffset: 0* Thanks Viru On Fri, May 24, 2013 at 2:53 PM, Alvaro Herrera wrote: > Virupaksha Kanjilal escribió: > > Does anyone know what the fields in the output of pg_controldata mean? > > A lot of people. What do you want to know, precisely? > > -- > Álvaro Herrerahttp://www.2ndQuadrant.com/ > PostgreSQL Development, 24x7 Support, Training & Services >
Re: [ADMIN] How do I know my table is bloated?
On Thu, May 30, 2013 at 6:05 AM, Rodrigo Barboza wrote: > I saw some people talking about the reindex command and I read in the docs > the one reason to use reindex is when a table is bloated. > But how do I know when a table is bloated? Take a look at the pgcompactor tool https://code.google.com/p/pgtoolkit/. This will find out what tables and indexes in your cluster are bloated and softly (without heavy locks) remove the bloat. Before using it setup the pgstattuple extension in all the databases you age going to check for bloat. Some usage examples are below. To get bloat statistics for all the cluster do: pgcompactor --all --reindex --verbose info --dry-run To remove bloat from all the cluster: pgcompactor --all --reindex --verbose info For a specific table use: pgcompactor --table tablename --reindex --verbose info --dry-run You can also specify --dbname, --schema, --exclude-, etc. For all the options: pgcompactor --man -- Kind regards, Sergey Konoplev PostgreSQL Consultant and DBA Profile: http://www.linkedin.com/in/grayhemp Phone: USA +1 (415) 867-9984, Russia +7 (901) 903-0499, +7 (988) 888-1979 Skype: gray-hemp Jabber: gray...@gmail.com -- Sent via pgsql-admin mailing list (pgsql-admin@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin
Re: [ADMIN] How do I know my table is bloated?
On Fri, May 31, 2013 at 2:06 AM, Sergey Konoplev wrote: > On Thu, May 30, 2013 at 6:05 AM, Rodrigo Barboza > wrote: > > I saw some people talking about the reindex command and I read in the > docs > > the one reason to use reindex is when a table is bloated. > > But how do I know when a table is bloated? > > Take a look at the pgcompactor tool > https://code.google.com/p/pgtoolkit/. This will find out what tables > and indexes in your cluster are bloated and softly (without heavy > locks) remove the bloat. Before using it setup the pgstattuple > extension in all the databases you age going to check for bloat. Some > usage examples are below. > > To get bloat statistics for all the cluster do: > > pgcompactor --all --reindex --verbose info --dry-run > > To remove bloat from all the cluster: > > pgcompactor --all --reindex --verbose info > > For a specific table use: > > pgcompactor --table tablename --reindex --verbose info --dry-run > > You can also specify --dbname, --schema, --exclude-, > etc. > > For all the options: > > pgcompactor --man > > -- > Kind regards, > Sergey Konoplev > PostgreSQL Consultant and DBA > > Profile: http://www.linkedin.com/in/grayhemp > Phone: USA +1 (415) 867-9984, Russia +7 (901) 903-0499, +7 (988) 888-1979 > Skype: gray-hemp > Jabber: gray...@gmail.com > Thanks, guys!
Re: [ADMIN] Standby doesn't chose a new timeline when promoted to master
On Thu, May 30, 2013 at 2:17 AM, prakhar jauhari wrote: > I am trying to set up Postgres 9.2 in HA mode. But i have noticed something > strange happening with the xlogs being generated after a switch over. > > Problem: > When a standby is promoted to master mode its not choosing a new timeline to > work with. Can anyone please help me with the situations in which a standby > doesn't chose a new timeline when promoted.. Could you please show the slave's log at the time of promotion to the master, and your recovery.conf content. -- Kind regards, Sergey Konoplev PostgreSQL Consultant and DBA Profile: http://www.linkedin.com/in/grayhemp Phone: USA +1 (415) 867-9984, Russia +7 (901) 903-0499, +7 (988) 888-1979 Skype: gray-hemp Jabber: gray...@gmail.com -- Sent via pgsql-admin mailing list (pgsql-admin@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin