garrensmith / smash

A query engine concurrent simulator

Smash

A prisma query-engine concurrency runner. Smash can be used to run concurrent requests against the prisma query engine. Currently it has workloads designed to test the interactive transactions in the query engine.

Options

Smash - A query engine concurrent simulator

USAGE:
    smash [OPTIONS]

OPTIONS:
    -c, --concurrency <CONCURRENCY>    [default: 10]
    -h, --help                         Print help information
    -i, --iterations <ITERATIONS>      Number of times to run it [default: 1]
    -n, --name <NAME>                  [default: simple]
    -t, --timeout <TIMEOUT>            Timeout in milliseconds for a transaction [default: 1000]
    -V, --version                      Print version information
    -w, --wait <WAIT>                  Wait time for a connection in milliseconds [default: 5000]

A basic run would be:

smash -c 10 -n simple -i 3 -t 1000 -w 5000

That would run the simple workload with 10 concurrent connections and it will do that 3 times. A transaction will timeout after 1s and will wait 5s to get a database connection.

Workloads

At the moment there are two workloads:

• simple - A simple decrement update and batch update that will commit
• mixed - A workload that will rollback half of the operations and some just leave to timeout

Usage

Copy the below schema into dev_datamodel.prisma in the prisma-engines repo.

datasource db {
  provider = "postgres"
  url      = "postgresql://postgres:prisma@localhost:5434"
}

generator js {
  provider        = "prisma-client-js"
  previewFeatures = ["fullTextSearch", "fullTextIndex", "interactiveTransactions"]
}

model Account {
  id      Int    @id @default(autoincrement())
  email   String @unique
  balance Int
}

run:

$ make push-schema && make qe

Then run Smash.