Hi IQBAL, MOHAMMAD •,
Welcome to Microsoft Q&A forum.
As I understand, you are getting slowness in execution of queries in Azure Database for PostgreSQL.
Please refer to the detailed documentation here https://video2.skills-academy.com/en-us/azure/postgresql/flexible-server/how-to-identify-slow-queries for identify the slowness of queries and https://video2.skills-academy.com/en-us/azure/postgresql/single-server/concepts-query-performance-insight.
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Thanks