Technical Guide The First Hours of an Intrusion Investigation — Four Steps Through Tens of Millions of Auth Log Lines
4,812 failures. One success. All from the same IP. It could be an attack, or someone who forgot their password…
2026-08
Technical Guide 
Technical Guide The Day printf Debugging Hit 10GB — Four Ways to Live With Development Logs
10GB, waiting for me in the morning. It came from one printf I dropped into a loop before going to bed. Almost…
Comparison Editing a Huge File Is Not About “Can You Open It” — It’s About How Many Times You Can Stop: 010 Editor, UltraEdit and UwView Pro (Edit) on Mac ARM
When you work with a very large text file, "the editor can open it" is not the finish line. Real work looks li…
Comparison Editing a 48GB File — and Saving Mid-Way: EmEditor vs UwView Pro (Edit) on the Same Windows Laptop
Last time we compared "opening a 48GB file and searching it." This time we go one step further — editing it, a…
Technical Guide Where Finished Logs Go — Deciding Between Delete, Keep, and Compress
The incident investigation is over. The postmortem is written. What's left on disk is the tens of gigabytes of…
Technical Guide The Night the Log Wouldn’t Read — Four Character-Encoding Traps and How to Tell Them Apart
[Update, 16 October 2026] Speed today — Shift-JIS, EUC-JP and UTF-16 can now be searched fast through an index…
Technical Guide I Replaced 21,994 Occurrences in a 10GB, 100-Million-Line File in 16.8 Seconds. It Cost 3.7MB
This is what happened when UwView Pro's Edit Upgrade — Huge Files, No Rewriting was pointed at a 100-million-l…
Technical Guide You Found the ERROR. You Still Can’t Find the Cause — Four Ways to Trace Causality in Logs
--> grep ERROR worked. The red line is right there on your screen. And the "root cause" field in your report i…
Technical Guide “This File Is Too Large to Open” — Four Go-To Tools That Sink Under Huge Files, and What Comes Next
[Update, 16 October 2026] Speed today — 50 GB is about the same; even at 3 GB, the gap now opens from the seco…
Release Find Only Where ‘New York → Central Park → coffee_shop’ Appear in That Order — Sequence Search Comes to UwView Pro
A follow-up to Drill-down Search: the same tabbed UI now has a second mode, Sequence Search. Drill-down finds…