Invite latency trend — inviteDelay + inviteToRing — 30-day

01 What happened

Over the 30-day window 2026-05-05 to 06-03, the daily inviteToRing average (caller side, is_caller=1) rose monotonically from ~2.3 in early May to ~38.8 by 06-03, with a single-day peak of 87.3 on 2026-05-27. Over the same window the p50 held at 1 and p95 at ~8.

The daily inviteDelay p95 (callee side, is_caller=0) was ~1,600–2,200 in the first half of the window and stepped up to ~3,050–3,450 across 05/27–05/31, peaking at 3,450.7 on 2026-05-27. inviteDelay p50 stayed at ~2.3–3.9 throughout; the raw average ranged 5,000–13,000, consistently above p95.

02 Data

Period-over-period summary · 05/05–05/20 (first half) vs 05/21–06/03 (second half)

03 Observed scope

• Metrics: inviteDelay (callee, is_caller=0) and inviteToRing (caller, is_caller=1).
• Window: 2026-05-05 to 06-03 (30 daily partitions).
• inviteToRing: avg 2.3 → 38.8 across the window; single-day peak 87.3 on 05/27; p50/p95 flat (1 / ~8).
• inviteDelay: p95 elevated 05/27–05/31 (~3,050–3,450 vs ~1,800 baseline); p50 flat (~2.3–3.9); raw avg consistently above p95.
• Sample size: ~25–29M rows/day (inviteDelay) and ~21–25M rows/day (inviteToRing); highest volume day is also 05/27.
• Source: vew.dwd_botim_logs_footprint_voip_call_flatten_di, daily dt partitions.

04 Investigation