Conversation
- Column names now follow pgcenter convention: name,unit / %name (all_total,s / %all / read,KiB/s etc.) - UX section corrected: ↑/↓ change column width, / sets filter - Update all in-text column references to match new names - Add Q21/Q22 to interview capturing iodelay and record/report scope decisions Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Architecture: procpidstat view + Collector enrichment pattern. 8 implementation tasks across 3 waves + Final Wave. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Use CollectExtra int on View (not string name detection) - IOAvailable bool via view.View channel (not inaccessible Collector field) - record/stat.go → record/record.go (correct file) - Fix QueryAgeThresh template syntax (ne "", not gt) - First tick rate = 0 explicitly (not approximation) - Add stale PID cleanup to prevent memory growth - PID integer validation via strconv.Atoi before path construction - Isolate dialogChangeAge guard from compound dialog guard - Merge Tasks 6+7 (both modify top/config_view.go, wave conflict) - Add itv=0 division-by-zero guard - Specify ticks source (Collector.config.ticks) Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- viewSwitchHandler: manual view patching (load→patch→send) instead of wrong API usage
- CPU % formula: direct Δjiffies/(refresh_s*ticks)*100/cpuCount, not sValue
- IO rate: ΔBytes/refresh_s/1024 directly
- itv source: float64(int(refresh/time.Second)) from Update() top-level
- QueryAgeThresh: always-embedded convention (no conditional guard)
- Add Filters: map[int]*regexp.Regexp{} to view entry (nil map panic prevention)
- CollectExtra change-detection in collectStat() to trigger Reset() on view switch
- Add top/stat.go to modified files (collectStat change-detection)
- Add dev-security-auditor to Tasks 4, 5, 6
- Column widths: query gets remaining width via align.SetAlign()
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
3 validation rounds, all 5 validators approved. Minor cleanup: Task 2/4 descriptions trimmed of impl details; dev-security-auditor added to Task 2. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Wave 1: tasks 01 (procfs parsers), 02 (SQL query) — independent Wave 2: tasks 03 (result builder), 04 (view registration) — depends on W1 Wave 3: tasks 05 (collector), 06 (hotkey + guards) — depends on W2 Final: task 07 (pre-deploy QA) — depends on W3 Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- CollectProcPidStat = 6 (not 5) — iota offset from pgProcUptimeQuery string const - Task 03 depends_on: ["01", "02"] — wave completion precondition - All tasks: add decisions.md and overview.md to Context Files - Task 04: update record_test.go expected counts, fix 21 views (not 20) - Task 05: itv type float64 consistent with buildProcPidResult signature - Task 06: fix TDD Anchor (TUI callbacks not unit-testable), fix line number - Task 01: fix misleading utime/stime index description Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- CheckIOAvailable() exported (stat→top cross-package call requires export) - Task 05: itv is int, pass float64(itv) at buildProcPidResult call site - Task 05: CollectProcPidStat = 6 in all references - Tech-spec: CheckIOAvailable() exported form Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Task 03: buildProcPidResult signature itv float64 (not int) - Task 03: CheckIOAvailable() (exported) in all references - Task 05: float64(itv) cast documented at call site - Task 05: postgres.NewTestConnect() correct helper name Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
3 validation rounds. 7 tasks across 3 waves ready for implementation. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
New TUI screen (Shift+S) showing PostgreSQL backend CPU and IO utilization from Linux procfs alongside pg_stat_activity columns. 17 columns: pid, datname, usename, state, wait_etype, wait_event, accumulated CPU (HH:MM:SS), accumulated IO (KiB), CPU rates (%), IO rates (KiB/s), query. Features: - Local mode only (procfs not available for remote connections) - Graceful degradation when /proc/[pid]/io is inaccessible (EACCES) - I/A filters work same as activity screen - pgcenter record skips procpidstat (NotRecordable) - Panic-safe: 17-col guarantee prevents issue #99 class errors New packages: internal/stat/procpidstat.go New views: procpidstat in internal/view/view.go New query: internal/query/procpidstat.go Collector: internal/stat/stat.go (CollectExtra mechanism) TUI: top/config_view.go, top/keybindings.go, top/dialog.go, top/help.go Docs: features-catalog.md, decisions-log.md, tech-debt.md Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
…g, edge case clarity
…column narrative, build gap, task descriptions
…ation, Context Files, frontmatter
…, Details headings
…elay-procpidstat) Add two new columns to the S-screen (Shift+S): - iodelay_total,s — accumulated IO wait time (HH:MM:SS) from /proc/[pid]/stat field 42 - %iodelay — fraction of time spent in D-state between ticks (%) Availability probe reads /proc/sys/kernel/task_delayacct at screen-open time. When disabled: both columns render as "" + warning in cmdline area. Combined warning when both IO and delay accounting are unavailable. %iodelay is not normalized by cpuCount (wall-clock blocked time, not CPU utilization). Resolves tech debt [001]. Supersedes ADR deferring iodelay to Netlink taskstats. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
…alog, ADR log, tech debt, archive - architecture.md: update procpidstat section (17→19 cols, add iodelay source, both probes) - patterns.md: extend printCmdline mutual exclusion note (4-branch pattern) - user-spec: add Post-implementation section (2 divergences, 2 added, 1 deferred) - metrics: finalize and copy to docs/metrics/ - archive: move docs/features/002-feat-iodelay-procpidstat/ → archive/ Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
…, PID validation, test file coverage, Task02 trim Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
…04 security reviewer, AC formula clarification Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
…port (003) Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
…st ownership, Task05 details Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
… export call sites, loop placement Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
…rt (003) Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Adds pgcenter record/report support for per-process system stats (procpidstat, Shift+S). Closes tech-debt [002]. - MVC split of buildProcPidResult (buildProcPidResultRaw + formatProcPidResultForDisplay) - Exports: BuildProcPidResult, ReadProcPidStat, ReadProcPidIO, GetSysticksLocal, SysInfo - tarRecorder stateful: prev/curr ProcPidStat/ProcPidIO maps, sysinfo.TIMESTAMP.json per tick - Local/remote gate via db.Local in app.setup() - pgcenter report -N flag; sysinfo merge into metadata; WARNING/INFO detection - 18 review JSON reports, QA passed 10/11 AC (AC11 TUI requires manual check) Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This was referenced May 19, 2026
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Summary
pgcenter record/pgcenter report -Nsupport for the per-process system stats screen (Shift+S, procpidstat). Closes tech-debt [002].buildProcPidResult→buildProcPidResultRaw+formatProcPidResultForDisplay; exportsBuildProcPidResult,ReadProcPidStat,ReadProcPidIO,GetSysticksLocal,SysInfotarRecorderis now stateful: prev/currProcPidStat/ProcPidIOmaps,sysinfo.TIMESTAMP.jsonwritten per tick, local/remote gate viadb.Localpgcenter report -N(--proc-stats): reads recorded procpidstat data with full formatting support (-s,-e,-o,-g,-l,-t)Also includes feature 002 (per-process iodelay columns,
iodelay_total,s+%iodelayin Shift+S screen).Test plan
make test— all greenmake lint— cleanmake build && pgcenter record -c 3 -i 1s -f /tmp/test.tar && pgcenter report -N -f /tmp/test.tar— non-empty output with timestampspgcenter report -N -f report/testdata/pgcenter.stat.golden.tar— INFO "no procpidstat data", exit 0pgcenter top → Shift+S— 19 columns, no panic (manual)🤖 Generated with Claude Code