How much latency does Two-Phase Commit (2PC) add?

2PC requires 2 network round-trips for prepare + commit phases. With 5ms inter-service latency, 2PC adds 10-20ms minimum overhead. Under contention, p99 latency can be 100-1000x slower.

Is Saga pattern faster than 2PC?

Saga pattern eliminates 2PC but adds compensating transaction complexity. Choreography latency is similar to 2PC. Orchestrator-based Saga adds 1-2 extra hops but simplifies rollback.

When should I avoid distributed transactions?

Avoid distributed transactions when possible. Use eventual consistency, idempotent operations, and Outbox pattern instead. Reserve 2PC for strict financial compliance where atomicity is legally required.

Distributed Transaction Overhead Calculator

Calculate the latency and throughput overhead of distributed transactions (2PC, Saga). 2PC adds 2-10x latency vs local transactions; quantify the cost of strong consistency.

AI & SaaS Tools

SaaS Metrics

AI Compute

AI ROI

LTV:CAC Ratio

ARPU ($/month)

Monthly Churn %

CAC ($)

Gross Margin %

LTV

$3500

LTV:CAC

11.67

Payback

2.9 mo

Health

Healthy ✓

Benchmark: LTV:CAC ≥ 3 is healthy. Payback under 12 months is excellent. Under 1 means you lose money on each customer.

How to Use

Enter the values for the scenario you are assessing. Calculate the latency and throughput overhead of distributed transactions (2PC, Saga). 2PC adds 2-10x latency vs local transactions; quantify the cost of strong consistency. Use the distributed transaction cost result to inform your calculation.

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Distributed Transaction Overhead Calculator

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Frequently Asked Questions

How much latency does Two-Phase Commit (2PC) add?

Is Saga pattern faster than 2PC?

When should I avoid distributed transactions?