Cloud SQL pricing in GCP - Cheat Sheet & Quick Revision

Recall & Review

beginner

What are the main components that affect Cloud SQL pricing?

The main components are: instance size (CPU and memory), storage amount and type, network usage, and backup storage.

beginner

How does storage type impact Cloud SQL costs?

Using SSD storage costs more than standard HDD storage but offers better performance.

intermediate

Why does network usage affect Cloud SQL pricing?

Data sent out of Cloud SQL to the internet or other regions can incur network egress charges.

intermediate

What is the pricing impact of backups in Cloud SQL?

Backup storage beyond the size of your database is charged separately, so frequent or large backups increase costs.

beginner

How does instance uptime affect Cloud SQL pricing?

You pay for the instance while it is running, so stopping an instance can reduce costs.

Which factor does NOT directly affect Cloud SQL pricing?

A Amount of storage used

B Number of database users

C Instance CPU and memory size

D Network egress traffic

Cloud SQL pricing depends on resources like CPU, memory, storage, and network, not on the number of users.

What type of storage is more expensive but faster in Cloud SQL?

A Standard HDD

B Tape storage

C SSD

D In-memory storage

SSD storage costs more than HDD but provides better performance.

When are network egress charges applied in Cloud SQL?

A When data is sent to the internet or other regions

B When data is sent within the same region

C When data is stored on disk

D When backups are created

Network egress charges apply when data leaves the Cloud SQL region or goes to the internet.

How can you reduce Cloud SQL costs related to instance uptime?

A Stop the instance when not in use

B Use more backups

C Add more users

D Increase storage size

Stopping the instance when not needed stops billing for compute resources.

What happens if your backup storage exceeds your database size in Cloud SQL?

A Backup storage is unlimited and free

B You get free extra storage

C Backups are deleted automatically

D You pay extra for the additional backup storage

Backup storage beyond the database size is charged separately.

Explain the main factors that influence Cloud SQL pricing and how they affect your monthly bill.

Think about what resources you use and how long your database runs.

Describe ways to optimize Cloud SQL costs without sacrificing performance.

Consider balancing cost and performance carefully.

Practice

1. Which factor does NOT directly affect the pricing of a Cloud SQL instance?

easy

A. The amount of network egress traffic

B. The amount of storage used

C. The size of the instance (CPU and RAM)

D. The number of users accessing the database

Solution

1. Step 1: Identify pricing factors for Cloud SQL

   Cloud SQL pricing depends on instance size, storage, backups, and network usage.

2. Step 2: Analyze the impact of users

   The number of users does not directly affect pricing; costs are based on resources used, not user count.

3. Final Answer:

   The number of users accessing the database -> Option D

4. Quick Check:

   Users do not affect pricing directly [OK]

Hint: Focus on resource usage, not user count, for pricing [OK]

Common Mistakes:

• Thinking more users always increase cost directly
• Confusing network traffic with user count
• Ignoring storage and instance size impact

2. Which of the following is the correct way to describe Cloud SQL pricing components?

easy

A. Pricing depends only on the number of database queries.

B. Pricing is fixed monthly regardless of usage.

C. Pricing is based on instance size, storage, backups, and network usage.

D. Pricing is based solely on the number of database users.

Solution

1. Step 1: Recall Cloud SQL pricing components

   Cloud SQL pricing includes instance size, storage, backups, and network usage.

2. Step 2: Compare options to pricing facts

   Only Pricing is based on instance size, storage, backups, and network usage. correctly lists the main pricing factors; others are incorrect or incomplete.

3. Final Answer:

   Pricing is based on instance size, storage, backups, and network usage. -> Option C

4. Quick Check:

   Pricing components = instance size, storage, backups, network [OK]

Hint: Remember pricing depends on resources, not fixed or query count [OK]

Common Mistakes:

• Assuming pricing is fixed monthly
• Confusing query count with pricing
• Ignoring backups and network costs

3. A Cloud SQL instance uses 4 vCPUs and 15 GB RAM, with 100 GB storage and 10 GB network egress. Which cost factor will likely be the highest contributor to the monthly bill?

medium

A. Instance size (CPU and RAM)

B. Storage

C. Network egress

D. Backups

Solution

1. Step 1: Analyze resource usage

   Instance size with 4 vCPUs and 15 GB RAM is a significant resource, usually costing more than storage or network for moderate usage.

2. Step 2: Compare other factors

   Storage of 100 GB and network egress of 10 GB are moderate; backups cost depends on backup size but usually less than instance size.

3. Final Answer:

   Instance size (CPU and RAM) -> Option A

4. Quick Check:

   Instance size usually costs most [OK]

Hint: Instance size usually dominates cost over storage and network [OK]

Common Mistakes:

• Overestimating network egress cost
• Ignoring instance size impact
• Assuming backups cost more than instance

4. You configured a Cloud SQL instance with 2 vCPUs and 7.5 GB RAM, but your monthly bill is unexpectedly high. Which of the following could be a likely cause?

medium

A. You set the instance size to 1 vCPU instead of 2.

B. You enabled automated backups with large backup storage.

C. You reduced network egress to zero.

D. You deleted all storage volumes.

Solution

1. Step 1: Identify possible cost causes

   Automated backups can increase storage costs significantly if backup size is large.

2. Step 2: Evaluate other options

   Setting instance size smaller reduces cost, reducing network egress lowers cost, deleting storage is not possible without data loss and would not increase cost.

3. Final Answer:

   You enabled automated backups with large backup storage. -> Option B

4. Quick Check:

   Backups can increase cost unexpectedly [OK]

Hint: Check backup storage size if bill is high unexpectedly [OK]

Common Mistakes:

• Assuming smaller instance size increases cost
• Ignoring backup storage impact
• Thinking deleting storage increases cost

5. You want to minimize your Cloud SQL monthly cost while maintaining performance. Which combination of actions is best?

hard

A. Choose an appropriate instance size, use balanced storage type, and schedule backups during off-peak hours.

B. Choose a larger instance size, use HDD storage, and disable backups.

C. Choose the smallest instance size, disable backups, and ignore network usage.

D. Choose a smaller instance size, use SSD storage, and enable automated backups.

Solution

1. Step 1: Balance instance size and storage

   Choosing an appropriate instance size and balanced storage optimizes cost and performance.

2. Step 2: Manage backups smartly

   Scheduling backups during off-peak hours reduces performance impact and controls costs without disabling backups.

3. Final Answer:

   Choose an appropriate instance size, use balanced storage type, and schedule backups during off-peak hours. -> Option A

4. Quick Check:

   Balance resources and backup timing for cost and performance [OK]

Hint: Balance size, storage, and backup timing for best cost [OK]

Common Mistakes:

• Choosing smallest instance ignoring performance
• Disabling backups risking data loss
• Ignoring storage type impact