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a12e4261a3
We set it for neon replica, if primary is running. Postgres uses this GUC at the start, to determine if replica should wait for RUNNING_XACTS from primary or not. Corresponding cloud PR is https://github.com/neondatabase/cloud/pull/10183 * Add test hot-standby replica startup. * Extract oldest_running_xid from XlRunningXits WAL records. --------- Co-authored-by: Konstantin Knizhnik <knizhnik@neon.tech> Co-authored-by: Konstantin Knizhnik <knizhnik@garret.ru> Co-authored-by: Heikki Linnakangas <heikki@neon.tech>
31 lines
1.6 KiB
Python
31 lines
1.6 KiB
Python
from fixtures.log_helper import log
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from fixtures.neon_fixtures import NeonEnv, wait_replica_caughtup
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def test_replication_start(neon_simple_env: NeonEnv):
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env = neon_simple_env
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with env.endpoints.create_start(branch_name="main", endpoint_id="primary") as primary:
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with primary.connect() as p_con:
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with p_con.cursor() as p_cur:
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p_cur.execute("begin")
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p_cur.execute("create table t(pk integer primary key, payload integer)")
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p_cur.execute("insert into t values (generate_series(1,100000), 0)")
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p_cur.execute("select txid_current()")
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xid = p_cur.fetchall()[0][0]
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log.info(f"Master transaction {xid}")
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with env.endpoints.new_replica_start(
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origin=primary, endpoint_id="secondary"
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) as secondary:
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wait_replica_caughtup(primary, secondary)
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with secondary.connect() as s_con:
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with s_con.cursor() as s_cur:
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# Enforce setting hint bits for pg_class tuples.
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# If master's transaction is not marked as in-progress in MVCC snapshot,
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# then XMIN_INVALID hint bit will be set for table's 't' tuple makeing it invisible.
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s_cur.execute("select * from pg_class")
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p_cur.execute("commit")
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wait_replica_caughtup(primary, secondary)
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s_cur.execute("select * from t where pk = 1")
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assert s_cur.fetchone() == (1, 0)
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