Keyword Analysis & Research: postgresql pg_wal


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Frequently Asked Questions

What is Wal in PostgreSQL and how to enable it?

It helps maintain data integrity by facilitating a recovery process in the case of a database crash. WAL is enabled in PostgreSQL by default and has a default size of 16MB. These files are found in pg_xlog or pg_wal (PostgreSQL 10) directory. The log files are written sequentially and hence the cost of scanning through these files is quite less.

What is PG_Wal directory in PostgreSQL?

The pg_wal directory is used in PostgreSQL version 10 and in the previous version this directory we called pg_xlog. We can control all WAL file with the help of wal_keep_segments and we also control the size of the WAL file by using max_wal_size.

What is the default size of winwal in PostgreSQL?

WAL is enabled in PostgreSQL by default and has a default size of 16MB. These files are found in pg_xlog or pg_wal (PostgreSQL 10) directory. The log files are written sequentially and hence the cost of scanning through these files is quite less.

What is PG_xlog in PostgreSQL?

Let me take a little detour here, for those who are unfamiliar with pg_xlog. pg_xlogis a directory where Postgres keeps its transaction log (also known as XLOGor WAL) which is used for recovery purposes.

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