Re: streaming replication does not work across datacenter with 20ms latency? - Mailing list pgsql-general

From Yan Chunlu
Subject Re: streaming replication does not work across datacenter with 20ms latency?
Date
Msg-id CAOA66tEuTObhKFt-+LLX-aafUGuFPOu+i7oksG2687WGh0v1EQ@mail.gmail.com
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In response to Re: streaming replication does not work across datacenter with 20ms latency?  ("Tomas Vondra" <tv@fuzzy.cz>)
Responses Re: streaming replication does not work across datacenter with 20ms latency?
Re: streaming replication does not work across datacenter with 20ms latency?
List pgsql-general
checkpoint_segments = 64
wal_keep_segments = 128

On Sun, Jul 24, 2011 at 8:25 PM, Tomas Vondra <tv@fuzzy.cz> wrote:
> On 24 Červenec 2011, 6:09, Yan Chunlu wrote:
>> thanks for all the help!
>>
>> @Adrian:  yes, only one instance on each machine
>>
>> not the slave finally started and could be connect, replication didn't
>> begin, just following errors:
>> https://gist.github.com/1102225
>
> These errors just mean the master already removed WAL segments, so the
> slave can't actually start the replication because there'd be a gap. This
> usually happens with enough write activity (inserts, updates) when the
> slave is being setup.
>
> Whaht is your wal_keep_segments value? Increase it or set up WAL
> archiving, so that the slave can get the data.
>
> Tomas
>
>

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