Re: Optimize streaming replication because of network latency

On 12/10/20 11:41 AM, Mai Peng wrote:
> Hello,
>
> We’ve added a streaming standby on a gcp container. There’s a lot of
> network latency between our primary in EU and this standby in South America.
> I did a big update on a table ( 4 millions rows) and it generates a lot of
> lag : more than 5 hours.
> The standby has great hardware ressources: cpu, ssd disk and had no load
> during this update.
> How could we handle this lag and have less impact, less lag ?

How effectively fast is the pipe between the two servers?  Where are the
bottlenecks?  Is the pipe shared by other users?

> Basic PG Config:
>    shared_buffers = 8GB
>    work_mem = 128MB
>    max_connections = 600
>    wal_keep_segments = 1000
>    wal_sender_timeout = 0
>    replication_timeout=(not set)
>    wal_receiver_status_interval=10s
>    max_wal_senders=20
> Checkpoint_timeout = 10min
>  Max_wal_size= 2GB
>  min_wal_size= 1GB
>
>
> Thank you
> Mai

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