mirror of
https://github.com/neondatabase/neon.git
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5bd8e2363a
This will help to keep us from using deprecated Python features going forward. Signed-off-by: Tristan Partin <tristan@neon.tech>
99 lines
3.9 KiB
Python
99 lines
3.9 KiB
Python
from __future__ import annotations
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import timeit
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from pathlib import Path
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from fixtures.benchmark_fixture import PgBenchRunResult
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from fixtures.compare_fixtures import NeonCompare
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from fixtures.neon_fixtures import fork_at_current_lsn
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from performance.test_perf_pgbench import utc_now_timestamp
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# -----------------------------------------------------------------------
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# Start of `test_compare_child_and_root_*` tests
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# -----------------------------------------------------------------------
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# `test_compare_child_and_root_*` tests compare the performance of a branch and its child branch(s).
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# A common pattern in those tests is initializing a root branch then creating a child branch(s) from the root.
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# Each test then runs a similar workload for both child branch and root branch. Each measures and reports
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# some latencies/metrics during the workload for performance comparison between a branch and its ancestor.
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def test_compare_child_and_root_pgbench_perf(neon_compare: NeonCompare):
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env = neon_compare.env
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pg_bin = neon_compare.pg_bin
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def run_pgbench_on_branch(branch: str, cmd: list[str]):
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run_start_timestamp = utc_now_timestamp()
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t0 = timeit.default_timer()
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out = pg_bin.run_capture(
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cmd,
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)
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run_duration = timeit.default_timer() - t0
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run_end_timestamp = utc_now_timestamp()
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stdout = Path(f"{out}.stdout").read_text()
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res = PgBenchRunResult.parse_from_stdout(
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stdout=stdout,
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run_duration=run_duration,
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run_start_timestamp=run_start_timestamp,
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run_end_timestamp=run_end_timestamp,
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)
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neon_compare.zenbenchmark.record_pg_bench_result(branch, res)
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env.create_branch("root")
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endpoint_root = env.endpoints.create_start("root")
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pg_bin.run_capture(["pgbench", "-i", "-I", "dtGvp", endpoint_root.connstr(), "-s10"])
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fork_at_current_lsn(env, endpoint_root, "child", "root")
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endpoint_child = env.endpoints.create_start("child")
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run_pgbench_on_branch("root", ["pgbench", "-c10", "-T10", endpoint_root.connstr()])
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run_pgbench_on_branch("child", ["pgbench", "-c10", "-T10", endpoint_child.connstr()])
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def test_compare_child_and_root_write_perf(neon_compare: NeonCompare):
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env = neon_compare.env
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env.create_branch("root")
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endpoint_root = env.endpoints.create_start("root")
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endpoint_root.safe_psql(
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"CREATE TABLE foo(key serial primary key, t text default 'foooooooooooooooooooooooooooooooooooooooooooooooooooo')",
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)
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env.create_branch("child", ancestor_branch_name="root")
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endpoint_child = env.endpoints.create_start("child")
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with neon_compare.record_duration("root_run_duration"):
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endpoint_root.safe_psql("INSERT INTO foo SELECT FROM generate_series(1,1000000)")
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with neon_compare.record_duration("child_run_duration"):
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endpoint_child.safe_psql("INSERT INTO foo SELECT FROM generate_series(1,1000000)")
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def test_compare_child_and_root_read_perf(neon_compare: NeonCompare):
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env = neon_compare.env
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env.create_branch("root")
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endpoint_root = env.endpoints.create_start("root")
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endpoint_root.safe_psql_many(
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[
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"CREATE TABLE foo(key serial primary key, t text default 'foooooooooooooooooooooooooooooooooooooooooooooooooooo')",
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"INSERT INTO foo SELECT FROM generate_series(1,1000000)",
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]
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)
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env.create_branch("child", ancestor_branch_name="root")
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endpoint_child = env.endpoints.create_start("child")
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with neon_compare.record_duration("root_run_duration"):
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endpoint_root.safe_psql("SELECT count(*) from foo")
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with neon_compare.record_duration("child_run_duration"):
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endpoint_child.safe_psql("SELECT count(*) from foo")
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# -----------------------------------------------------------------------
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# End of `test_compare_child_and_root_*` tests
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# -----------------------------------------------------------------------
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