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neon/test_runner/performance/pageserver/README.md
Alexander Bayandin c96593b473 Make Postgres 16 default version (#8745) 
## Problem

The default Postgres version is set to 15 in code, while we use 16 in
most of the other places (and Postgres 17 is coming)

## Summary of changes
- Run `benchmarks` job with Postgres 16 (instead of Postgres 14)
- Set `DEFAULT_PG_VERSION` to 16 in all places
- Remove deprecated `--pg-version` pytest argument
- Update `test_metadata_bincode_serde_ensure_roundtrip` for Postgres 16
2024-08-20 10:46:58 +01:00

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How to reproduce benchmark results / run these benchmarks interactively.

  1. Get an EC2 instance with Instance Store. Use the same instance type as used for the benchmark run.
  2. Mount the Instance Store => neon.git/scripts/ps_ec2_setup_instance_store
  3. Use a pytest command line (see other READMEs further up in the pytest hierarchy).

For tests that take a long time to set up / consume a lot of storage space, we use the test suite's repo_dir snapshotting functionality (from_repo_dir). It supports mounting snapshots using overlayfs, which improves iteration time.

Here's a full command line.

RUST_BACKTRACE=1 NEON_ENV_BUILDER_USE_OVERLAYFS_FOR_SNAPSHOTS=1 DEFAULT_PG_VERSION=16 BUILD_TYPE=release \
    ./scripts/pytest test_runner/performance/pageserver/pagebench/test_pageserver_max_throughput_getpage_at_latest_lsn.py