Allow pmstat to auto-hide unavailable columns #2421
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…ty of metrics. Pretty close, but column data is shifted right by a single column. This used Claude Code. (Even AI gets off-by-one errors?)
…er columns that were still showing up.
…e column detection method cleaner.
This change adds optional dynamic column hiding to pmstat, allowing it to automatically suppress columns for metrics that are unavailable on the current platform. This is particularly useful for macOS and other platforms where some Linux-specific metrics (like swap in/out, buffer memory, etc.) don't exist. Instead of showing "?" for missing values, the columns are simply not displayed. Usage: pmstat # Default: show all columns (original behavior) pmstat -C # Compact: hide unavailable metric columns Note: This commit is part of separating cross-platform tool improvements from platform-specific PMDA enhancements. Darwin PMDA swap metrics have been split into a separate PR for the macOS-specific enhancement branch. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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At the moment,
pmstaton macOS is quite lean on what it can show because some metrics are not available (yet).I've modified
pmstatso that it (optionally) hides columns that are not available.I held several sessions with Claude Code to get here because it's certainly better at C than I am... After some back and forth I narrowed in on the
-Cand--compactmode forpmstatwhich seemed to not conflict with any other pm-tool that Claude looked at (and my fuzzy memory). I elected to make this compact mode optional, and not default, just to maintain backwards compatibility. There's certainly a 'brain freeze' moment when one runspmstatand sees a lot of columns missing, so I wondered if it was better to maintain the original layout (with missing metrics) as the default for us old folks...This goes towards #2303