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3d869cbcde
- Introduce ruff (https://beta.ruff.rs/) to replace flake8 and isort - Update mypy and black
80 lines
2.4 KiB
Python
80 lines
2.4 KiB
Python
import asyncio
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from io import BytesIO
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from fixtures.compare_fixtures import PgCompare
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from fixtures.neon_fixtures import PgProtocol
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async def repeat_bytes(buf, repetitions: int):
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for i in range(repetitions):
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yield buf
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async def copy_test_data_to_table(pg: PgProtocol, worker_id: int, table_name: str):
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buf = BytesIO()
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for i in range(1000):
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buf.write(
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f"{i}\tLoaded by worker {worker_id}. Long string to consume some space.\n".encode()
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)
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buf.seek(0)
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copy_input = repeat_bytes(buf.read(), 5000)
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pg_conn = await pg.connect_async()
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await pg_conn.copy_to_table(table_name, source=copy_input)
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async def parallel_load_different_tables(pg: PgProtocol, n_parallel: int):
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workers = []
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for worker_id in range(n_parallel):
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worker = copy_test_data_to_table(pg, worker_id, f"copytest_{worker_id}")
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workers.append(asyncio.create_task(worker))
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# await all workers
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await asyncio.gather(*workers)
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# Load 5 different tables in parallel with COPY TO
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def test_parallel_copy_different_tables(neon_with_baseline: PgCompare, n_parallel=5):
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env = neon_with_baseline
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conn = env.pg.connect()
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cur = conn.cursor()
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for worker_id in range(n_parallel):
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cur.execute(f"CREATE TABLE copytest_{worker_id} (i int, t text)")
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with env.record_pageserver_writes("pageserver_writes"):
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with env.record_duration("load"):
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asyncio.run(parallel_load_different_tables(env.pg, n_parallel))
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env.flush()
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env.report_peak_memory_use()
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env.report_size()
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async def parallel_load_same_table(pg: PgProtocol, n_parallel: int):
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workers = []
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for worker_id in range(n_parallel):
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worker = copy_test_data_to_table(pg, worker_id, "copytest")
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workers.append(asyncio.create_task(worker))
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# await all workers
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await asyncio.gather(*workers)
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# Load data into one table with COPY TO from 5 parallel connections
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def test_parallel_copy_same_table(neon_with_baseline: PgCompare, n_parallel=5):
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env = neon_with_baseline
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conn = env.pg.connect()
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cur = conn.cursor()
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cur.execute("CREATE TABLE copytest (i int, t text)")
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with env.record_pageserver_writes("pageserver_writes"):
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with env.record_duration("load"):
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asyncio.run(parallel_load_same_table(env.pg, n_parallel))
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env.flush()
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env.report_peak_memory_use()
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env.report_size()
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