Posts (page 44)
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6 min readConnection pooling in PostgreSQL helps optimize the usage of database connections and improve performance by reducing the overhead of establishing new connections for every request. To configure connection pooling in PostgreSQL, you can use tools like pgBouncer or pgbadger. These tools allow you to set up a pool of database connections that can be reused by multiple client applications, reducing the number of connections established and closed frequently.
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5 min readIn PostgreSQL, errors and exceptions can be handled using the built-in exception handling mechanism. This involves using the BEGIN, UPDATE, and ROLLBACK statements to define a block of code where errors can be caught and handled accordingly.By using the PGRAISE statement, custom error messages can be raised within the block of code to handle specific exceptions. Additionally, the EXCEPTION clause can be used to catch specific errors and perform custom actions based on the error type.
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7 min readTo configure SSL/TLS for PostgreSQL connections, you will need to generate a server certificate and key pair. Once you have these files, you will need to update your PostgreSQL configuration file to enable SSL connections. This typically involves setting the ssl parameter to on and specifying the location of your server certificate and key files. You may also need to specify the location of a root certificate authority file if your clients will be verifying the server's identity.
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6 min readTo upgrade PostgreSQL to a new version, you will need to follow a few steps. Firstly, make sure to backup all of your databases before starting the upgrade process. Next, download and install the new version of PostgreSQL on your server. Once installed, you will need to migrate your databases from the old version to the new version. This can be done using the pg_upgrade tool or by manually exporting and importing your databases.
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7 min readTo configure PostgreSQL for replication, you need to first enable replication in each PostgreSQL instance by setting the wal_level parameter to hot_standby in the postgresql.conf configuration file. Next, you need to set the max_wal_senders and wal_keep_segments parameters to allow enough replication slots and keep enough WAL segments for replication purposes.You also need to create a replication user with the necessary permissions to connect to the primary server and stream the WAL logs.
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4 min readMonitoring PostgreSQL performance is crucial for ensuring optimal database functioning. There are several ways to track and analyze its performance. One method is to use built-in PostgreSQL tools like pg_stat_statements and pg_stat_activity to check query performance and active connections. Additionally, monitoring tools like pganalyze or DataDog can provide detailed insights into various performance metrics such as query execution time, disk I/O, and buffer cache usage.
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5 min readTo optimize a query in PostgreSQL, there are several strategies that can be employed. One key factor is ensuring that the tables involved in the query have been properly indexed. Indexes help to speed up data retrieval by organizing and storing data in a way that makes it easier for the database to search through.Another important aspect of query optimization is writing efficient and structured SQL queries.
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5 min readTo set a local domain with XAMPP on Windows, you will first need to open the "httpd-vhosts.conf" file located in the XAMPP installation directory. In this file, you can set up your desired domain name and link it to the folder where your website files are stored.Next, you will need to edit the "hosts" file in the Windows system directory to map your local domain name to the localhost IP address.
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4 min readTo enable and configure logging in PostgreSQL, you need to modify the configuration file called "postgresql.conf".Find the "postgresql.conf" file in the data directory of your PostgreSQL installation.Open the file using a text editor.Find the section related to logging settings.Set the "logging_collector" parameter to "on" to enable logging.
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7 min readTo schedule a task, also known as a cron job, in PostgreSQL you can use the pg_cron extension. This extension allows you to schedule and run PostgreSQL commands at specific intervals.First, you need to install the pg_cron extension in your PostgreSQL database. You can do this by downloading the extension and adding it to the shared_preload_libraries parameter in your postgresql.conf file.Once the extension is installed, you can schedule a task by creating a new cron job using the cron.
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5 min readTo locate the database path in XAMPP, you need to navigate to the XAMPP installation directory on your computer. Once there, look for a folder named "mysql" or "MariaDB" depending on the version you are using. Inside this folder, you will find a subfolder named "data" which contains all the databases created within XAMPP. This is where the database path is located. You can access this path to manage, backup, or restore your databases in XAMPP.
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6 min readTo call a stored procedure in PostgreSQL, you first need to make sure that the procedure is already created in the database. Once the procedure exists, you can call it using the CALL statement followed by the name of the procedure and any required parameters. Optionally, you can also use the SELECT statement to call a procedure that returns a result set.