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How big should Wal keep segments be in streaming replication?
At least wal_keep_segments should be # larger than the number of segments generated between the beginning of # online-backup and the startup of streaming replication.
Why is my PostgreSQL streaming replication still failing?
My MASTER has archive_command set, and I have the missing WALs available. I copied them into a restore directory on the SLAVE and tried the recovery.conf below, but it still fails with the MASTER reporting the same WAL segment has already been moved error.
Who is the developer of synchronous log replication?
The lead developer is Masao Fujii. Synchronous Log Shipping Replication Presentation introduces the early design of the feature. XLOG records generated in the primary are periodically shipped to the standby via the network. In the existing warm standby, only records in a filled file are shipped, what’s referred to as file-based log-shipping.
How to restore archived Wal files in PostgreSQL?
Put a restore_command into recovery.conf that can restore archived WAL files and you are fine. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Provide details and share your research! But avoid … Asking for help, clarification, or responding to other answers.
How to limit Wal size when using Postgres logical replication slot?
When replicator java process is not running, the WAL size gets increased. Here is the query I use to find replication lag. This replication lag gets increased beyond RDS Disk, which shuts RDS down. I thought wal_keep_segments will take care of this, which was set to 32. But it did not work.
How does streaming replication work in Postgresql 9.0?
Streaming Replication (SR) provides the capability to continuously ship and apply the WAL XLOG records to some number of standby servers in order to keep them current. This feature was added to PostgreSQL 9.0.
What’s the difference between Wal and Wal-cybertec?
Using these parameters the WAL will skyrocket to staggering 23 GB. As you can see the amount of WAL can easily multiply if those settings are not ideal. Increasing the distance between checkpoints will certainly speed things up and have a positive impact on the WAL volume: