bbigras / noisia

Harmful workload generator for PostgreSQL

Noisia

Harmful workload generator for PostgreSQL.

---

Supported workloads:

• idle transactions - transactions that do nothing during its lifetime.
• rollbacks - transactions performed some work but rolled back in the end.
• waiting transactions - transaction locked by other transactions and thus waiting.
• deadlocks - simultaneous transactions where each hold locks that the other transactions wants.
• temporary files - queries that produce on-disk temporary files due to lack of work_mem.
• terminate backends - terminate random backends (or queries) using pg_terminate_backend(), pg_cancel_backend().
• failed connections - exhaust connections pool (other clients can't connect to Postgres)
• ...see built-in help for more runtime options.

Usage

Install golang, clone the repo and run make build. Check bin/ directory for noisia executable.

Using in your own code

You can import noisia and use necessary workloads in your code. Always use contexts to avoid infinite run. See tiny example below:

import (
  "context"
  "fmt"
  "github.com/lesovsky/noisia/waitxacts"
  "time"
)

func main() {
  config := &waitxacts.Config{
    PostgresConninfo:    "host=127.0.0.1",
    Jobs:                 2,
  }

  ctx, cancel := context.WithTimeout(context.Background(), 4*time.Second)
  defer cancel()

  w := waitxacts.NewWorkload(config)
  if err := w.Run(ctx); err != nil {
    fmt.Println(err)
  }
}

TODO/Ideas:

• sequential scans

Disclaimer

ATTENTION: USE ONLY FOR TESTING PURPOSES, DO NOT EXECUTE NOISIA AGAINST PRODUCTION, RECKLESS USAGE WILL CAUSE PROBLEMS.

DISCLAIMER: THIS SOFTWARE PROVIDED AS-IS WITH NO CARES AND GUARANTEES RELATED TO YOUR DATABASES. USE AT YOUR OWN RISK.

License

BSD-3. See LICENSE for more details.