Redis: PubSub Speed and Hotkeys Accuracy
Activity centers on efficiency at scale and measurement accuracy. Pattern matching and hash expiry work gets cheaper, while hotkeys tracking and help commands are corrected.
Duration: PT2M19S
Episode overview
This episode is a short developer briefing from Redis.
It explains recent repository work in plain language.
- Show: Redis
- Published: 2026-10-04T13:13:20Z
- Audio duration: PT2M19S
Transcript excerpt
This excerpt keeps the crawler page concise. Listen to the episode or use the RSS feed for the full update.
Hello, today is October 4th, 2026, and this is your Redis briefing.
The big theme is efficiency at scale, with two performance fixes on hot paths, plus two corrections to what operators see when they monitor or ask for help.
First, publish costs and hash expiry. Right now every publish and every keyspace notification is checked against every distinct pattern subscription, even when none can match. In PR 15896, measurements show a publish to an unmatched channel goes from point one two microseconds with one pattern to almost seventy-nine…
Second, accurate reporting and usable help. PR 15898 fixes hot keys tracking for multi-key commands. Per-key CPU and network bytes were divided evenly with the remainder dropped, so once keys outnumbered microseconds, every key got zero and was ignored. That meant reads through multi-key operations never showed up,…
What's next: if you depend on pattern matching or expiry-heavy hash workloads, benchmark these paths, and expect more trustworthy hot keys data for multi-key commands after the fix.
That's it for today, thanks for listening.