Assess Disk Usage for the 2023 Sales Partition

Querying Partition Size in PostgreSQL

Write a PostgreSQL query to check the disk size of a specific partition Sales_2023.

Solution:

-- Get the total size of the 'Sales_2023' partition in a human-readable format.
SELECT pg_size_pretty(pg_total_relation_size('Sales_2023'));

Explanation:

• Purpose of the Query:
• o Retrieves the disk space occupied by a partition.
• Key Components:
• pg_total_relation_size(): Fetches the table size.
• Real-World Application:
• Helps in storage management for large partitioned tables.

Notes:

• Use pg_size_pretty() for human-readable output.

For more Practice: Solve these Related Problems:

• Write a PostgreSQL query to retrieve the disk sizes of all partitions of a table in a single consolidated output.
• Write a PostgreSQL query to check the size of a specific partition and compare it against a predefined threshold value.
• Write a PostgreSQL query to list all partitions of a table sorted by their disk usage in descending order.
• Write a PostgreSQL query to fetch the disk size of a partition and convert the output into megabytes (MB) for easier interpretation.

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Previous PostgreSQL Exercise: Query Partition Metadata.