Luke Hebert
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Welcome to the articles section, where business, technology, and everyday problem-solving meet. You’ll find practical how-tos, troubleshooting notes from the trenches, and the occasional take on whatever’s happening in the world. Some posts will save you time, some will spark ideas, and a few will just be me thinking out loud. Grab a coffee and dig in.

DNS May 2, 2023

DNS

A practical guide to understanding DNS resolution tiers and troubleshooting name resolution issues in Linux environments. Covers /etc/nsswitch.conf, /etc/resolv.conf, and local caching services.
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Optimize PostgreSQL Server Performance Through Configuration April 27, 2023

Optimize PostgreSQL Server Performance Through Configuration

This guide walks through four key PostgreSQL configuration settings that significantly impact server performance. Learn how to tune shared_buffers, wal_buffers, effective_cache_size, and work_mem for your specific workload.
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PostgreSQL Shared Memory (Huge Pages) April 26, 2023

PostgreSQL Shared Memory (Huge Pages)

Calculating the right number of Linux huge pages for PostgreSQL is trickier than just dividing shared_buffers by the page size. This walkthrough shows how to use tuned to manage allocation and why you need to round up based on actual memory usage.
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PostgreSQL WAL Retention and Clean Up pg_archivecleanup April 21, 2023

PostgreSQL WAL Retention and Clean Up pg_archivecleanup

A practical guide to managing PostgreSQL WAL retention using the pg_archivecleanup utility, covering dry-run and delete modes, retention criteria, and a code walkthrough for novice users.
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Using SQLline to Test JDBC Connectors December 15, 2022

Using SQLline to Test JDBC Connectors

A practical guide to using SQLline to replicate SQL client behavior when testing JDBC connectors. Covers downloading the tool, setting up the classpath, and connecting to an Azure MySQL instance.
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Identity Crisis: SAML Rejecting Improper URIs March 29, 2022

Identity Crisis: SAML Rejecting Improper URIs

The ID4262 error occurs when a SAML NameIdentifier uses the entity format but contains an invalid URI. Two resolution steps fix the issue within your identity provider configuration.
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