PG_VARIABLE_INFO
PG_VARIABLE_INFO records information about transaction IDs and OIDs of the current node in the database.
Name | Type | Description |
|---|---|---|
node_name | text | Node name |
next_oid | oid | OID generated next time for the node |
next_xid | xid | Transaction ID generated next time for the node |
oldest_xid | xid | Oldest transaction ID on the node |
xid_vac_limit | xid | Critical point (transaction ID) that triggers forcible autovacuum |
oldest_xid_db | oid | OID of the database that has the minimum datafrozenxid on the node |
last_extend_csn_logpage | xid | Number of the last extended csnlog page |
start_extend_csn_logpage | xid | Number of the page from which csnlog extending starts |
next_commit_seqno | xid | CSN generated next time for the node |
latest_completed_xid | xid | Latest transaction ID on the node after the transaction commit or rollback |
startup_max_xid | xid | Last transaction ID before the node is powered off |
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