from contextlib import closing

from fixtures.compare_fixtures import PgCompare


#
# Run bulk INSERT test.
#
# Collects metrics:
#
# 1. Time to INSERT 5 million rows
# 2. Disk writes
# 3. Disk space used
# 4. Peak memory usage
#
def test_bulk_insert(neon_with_baseline: PgCompare):
    env = neon_with_baseline

    with closing(env.pg.connect()) as conn:
        with conn.cursor() as cur:
            cur.execute("create table huge (i int, j int);")

            # Run INSERT, recording the time and I/O it takes
            with env.record_pageserver_writes("pageserver_writes"):
                with env.record_duration("insert"):
                    cur.execute("insert into huge values (generate_series(1, 5000000), 0);")
                    env.flush()

            env.report_peak_memory_use()
            env.report_size()