GitHub Git handshake disruption on 7 October 2026

GitHub Git handshake from Amsterdam, Mumbai, San Francisco, Singapore, Tokyo, Montreal: degraded checks; 2026-10-07 12:00 UTC to 2026-10-07 19:30 UTC: peak Git handshake 1.29 s vs a usual 0.71 s.

What our checks saw: Degraded
Cities affected: Amsterdam, Mumbai, San Francisco, Singapore, Tokyo, Montreal
When: 7 Oct, 12:00 UTC to 7 Oct, 19:30 UTC
How long: 7.5 hours
Slowest check: 1.29 s, usually 708 ms
GitHub's status page: Open it

Where our checks saw it

Each glowing city had slow or failing checks during the incident, shown at its worst. We test from 6 cities, so other places may have been hit too.

Our checks, city by city

Each point is one check every 30 minutes, from three hours before the incident to three hours after. Coloured points are the checks we counted as slower or failing. The shaded area shows how far above the usual time they were.

Amsterdam

Each check (UTC)Usual (190 ms)Much slower, or failingSlow check outside the incidentIncident

Every check as a table

Time (UTC)	Check	Reading
09:00	305 ms	Normal
09:30	288 ms	Normal
10:00	410 ms	Normal
10:30	267 ms	Normal
11:00	289 ms	Normal
11:30	242 ms	Normal
12:00	1.06 s	Much slower, or failing
12:30	216 ms	Normal
13:00	738 ms	Much slower, or failing
13:30	254 ms	Normal
14:00	239 ms	Normal
14:30	233 ms	Normal
15:00	892 ms	Much slower, or failing
15:30	520 ms	Much slower, or failing
16:00	203 ms	Normal
16:30	193 ms	Normal
17:00	174 ms	Normal
17:30	676 ms	Much slower, or failing
18:00	178 ms	Normal
18:30	583 ms	Much slower, or failing
19:00	207 ms	Normal
19:30	225 ms	Normal
20:00	208 ms	Normal
20:30	261 ms	Normal
21:00	847 ms	Much slower, or failing
21:30	191 ms	Normal
22:00	1.00 s	Much slower, or failing
22:30	254 ms	Normal

San Francisco

Each check (UTC)Usual (235 ms)Slower than usualMuch slower, or failingIncident

Every check as a table

Time (UTC)	Check	Reading
09:00	233 ms	Normal
09:30	223 ms	Normal
10:00	228 ms	Normal
10:30	335 ms	Normal
11:00	302 ms	Normal
11:30	226 ms	Normal
12:00	549 ms	Slower than usual
12:30	292 ms	Normal
13:00	546 ms	Slower than usual
13:30	238 ms	Normal
14:00	236 ms	Normal
14:30	331 ms	Normal
15:00	628 ms	Much slower, or failing
15:30	1.23 s	Much slower, or failing
16:00	231 ms	Normal
16:30	235 ms	Normal
17:00	227 ms	Normal
17:30	232 ms	Normal
18:00	220 ms	Normal
18:30	237 ms	Normal
19:00	353 ms	Normal
19:30	233 ms	Normal
20:00	234 ms	Normal
20:30	223 ms	Normal
21:00	237 ms	Normal
21:30	309 ms	Normal
22:00	234 ms	Normal
22:30	241 ms	Normal

Montreal

Each check (UTC)Usual (85 ms)Much slower, or failingIncident

Every check as a table

Time (UTC)	Check	Reading
09:00	86 ms	Normal
09:30	91 ms	Normal
10:00	85 ms	Normal
10:30	196 ms	Normal
11:00	142 ms	Normal
11:30	78 ms	Normal
12:00	312 ms	Normal
12:30	153 ms	Normal
13:00	377 ms	Much slower, or failing
13:30	66 ms	Normal
14:00	87 ms	Normal
14:30	177 ms	Normal
15:00	347 ms	Much slower, or failing
15:30	666 ms	Much slower, or failing
16:00	80 ms	Normal
16:30	84 ms	Normal
17:00	70 ms	Normal
17:30	86 ms	Normal
18:00	79 ms	Normal
18:30	82 ms	Normal
19:00	182 ms	Normal
19:30	87 ms	Normal
20:00	77 ms	Normal
20:30	84 ms	Normal
21:00	95 ms	Normal
21:30	175 ms	Normal
22:00	81 ms	Normal
22:30	74 ms	Normal

Singapore

Each check (UTC)Usual (708 ms)Slower than usualMuch slower, or failingSlow check outside the incidentIncident

Every check as a table

Time (UTC)	Check	Reading
09:00	888 ms	Normal
09:30	800 ms	Normal
10:00	702 ms	Normal
10:30	705 ms	Normal
11:00	714 ms	Normal
11:30	734 ms	Normal
12:00	1.81 s	Much slower, or failing
12:30	775 ms	Normal
13:00	1.25 s	Slower than usual
13:30	728 ms	Normal
14:00	1.12 s	Slower than usual
14:30	728 ms	Normal
15:00	1.15 s	Slower than usual
15:30	707 ms	Normal
16:00	698 ms	Normal
16:30	698 ms	Normal
17:00	736 ms	Normal
17:30	738 ms	Normal
18:00	694 ms	Normal
18:30	803 ms	Normal
19:00	825 ms	Normal
19:30	754 ms	Normal
20:00	747 ms	Normal
20:30	774 ms	Normal
21:00	1.02 s	Normal
21:30	682 ms	Normal
22:00	2.06 s	Much slower, or failing
22:30	713 ms	Normal

Tokyo

Each check (UTC)Usual (188 ms)Much slower, or failingSlow check outside the incidentIncident

Every check as a table

Time (UTC)	Check	Reading
09:00	297 ms	Normal
09:30	203 ms	Normal
10:00	501 ms	Much slower, or failing
10:30	337 ms	Normal
11:00	282 ms	Normal
11:30	192 ms	Normal
12:00	649 ms	Much slower, or failing
12:30	178 ms	Normal
13:00	639 ms	Much slower, or failing
13:30	276 ms	Normal
14:00	294 ms	Normal
14:30	348 ms	Normal
15:00	779 ms	Much slower, or failing
15:30	703 ms	Much slower, or failing
16:00	203 ms	Normal
16:30	196 ms	Normal
17:00	173 ms	Normal
17:30	762 ms	Much slower, or failing
18:00	184 ms	Normal
18:30	299 ms	Normal
19:00	263 ms	Normal
19:30	196 ms	Normal
20:00	202 ms	Normal
20:30	266 ms	Normal
21:00	535 ms	Much slower, or failing
21:30	197 ms	Normal
22:00	876 ms	Much slower, or failing
22:30	208 ms	Normal

Mumbai

Each check (UTC)Usual (278 ms)Slower than usualMuch slower, or failingSlow check outside the incidentIncident

Every check as a table

Time (UTC)	Check	Reading
09:00	445 ms	Normal
09:30	327 ms	Normal
10:00	478 ms	Normal
10:30	463 ms	Normal
11:00	453 ms	Normal
11:30	376 ms	Normal
12:00	774 ms	Much slower, or failing
12:30	308 ms	Normal
13:00	1.17 s	Much slower, or failing
13:30	414 ms	Normal
14:00	531 ms	Slower than usual
14:30	402 ms	Normal
15:00	886 ms	Much slower, or failing
15:30	718 ms	Much slower, or failing
16:00	298 ms	Normal
16:30	264 ms	Normal
17:00	296 ms	Normal
17:30	621 ms	Slower than usual
18:00	374 ms	Normal
18:30	388 ms	Normal
19:00	447 ms	Normal
19:30	298 ms	Normal
20:00	418 ms	Normal
20:30	357 ms	Normal
21:00	966 ms	Much slower, or failing
21:30	270 ms	Normal
22:00	1.33 s	Much slower, or failing
22:30	350 ms	Normal

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