Cloud SQL pricing in GCP - Step-by-Step Execution

Process Flow - Cloud SQL pricing

Start: Choose Cloud SQL Instance

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Select Machine Type & Size

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Select Storage Type & Size

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Decide Backup & High Availability

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Calculate Costs: CPU + RAM + Storage + Backup + Network

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Review Monthly Estimate

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Deploy Instance

Pricing starts by selecting instance specs, storage, and options, then sums costs for CPU, RAM, storage, backups, and network to estimate monthly charges.

Execution Sample

GCP

Instance: 2 vCPUs, 8 GB RAM
Storage: 100 GB SSD
Backup: Enabled
Network: 10 GB egress

Calculate monthly cost based on chosen instance specs, storage, backup, and network usage.

Process Table

Step	Component	Input	Unit Price	Quantity	Cost Calculation	Cost (USD)
1	CPU & RAM	2 vCPUs, 8 GB RAM	$0.095 per vCPU/hr, $0.0125 per GB RAM/hr	730 hours	(2 x 0.095 + 8 x 0.0125) x 730	211.7
2	Storage	100 GB SSD	$0.17 per GB/month	100 GB	0.17 x 100	17.0
3	Backup Storage	20 GB	$0.08 per GB/month	20 GB	0.08 x 20	1.6
4	Network Egress	10 GB	$0.12 per GB	10 GB	0.12 x 10	1.2
5	Total Monthly Cost	-	-	-	Sum of above costs	231.5

💡 All components priced and summed for total monthly cost estimate.

Status Tracker

Variable	Start	After CPU & RAM	After Storage	After Backup	After Network	Final
Total Cost (USD)	0	211.7	228.7	230.3	231.5	231.5

Key Moments - 3 Insights

Why do CPU and RAM costs multiply by hours?

Because Cloud SQL charges CPU and RAM per hour of usage, as shown in execution_table row 1 where 730 hours (a month) is used.

Why is backup storage cost separate from main storage?

Backup storage is billed separately at a different rate, as seen in execution_table row 3, reflecting additional storage used for backups.

How does network egress affect total cost?

Network egress adds cost based on data leaving the cloud, shown in execution_table row 4, increasing the total monthly cost.

Visual Quiz - 3 Questions

Look at the execution table, what is the cost for CPU and RAM combined?

A $17.0

B $211.7

C $1.6

D $231.5

💡 Hint

Check the Cost (USD) column in row 1 of the execution_table.

At which step does the total monthly cost reach $231.5?

A After CPU & RAM calculation

B After Storage calculation

C After Network Egress calculation

D After Backup Storage calculation

💡 Hint

Look at the Final column in variable_tracker after each step.

If backup storage increases from 20 GB to 40 GB, how does the backup cost change?

A It doubles from $1.6 to $3.2

B It stays the same at $1.6

C It increases by $0.8

D It decreases

💡 Hint

Backup cost is $0.08 per GB; doubling GB doubles cost as per execution_table row 3.

Concept Snapshot

Cloud SQL pricing includes charges for:
- CPU and RAM (per hour)
- Storage (per GB per month)
- Backup storage (separate rate)
- Network egress (per GB)
Costs sum to estimate monthly bill.

Full Transcript

Cloud SQL pricing works by selecting instance specs like CPU and RAM, storage type and size, backup options, and network usage. Each component has a unit price. CPU and RAM are charged hourly, multiplied by hours in a month. Storage and backup are charged per GB monthly. Network egress is charged per GB of data leaving the cloud. Adding all these costs gives the total monthly estimate. This step-by-step calculation helps understand how each choice affects the bill.

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