{
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    "id": "incident_gcp_mSFVt6PiP557bjRyYsut",
    "slug": "google-cloud-google-cloud-storage-customers-are-experiencing-elevated-latencies-and-2026-10-08-bjryysut",
    "title": "Google Cloud Storage customers are experiencing elevated latencies and error rates when performing upload or write…",
    "summary": "Google Cloud Storage customers are experiencing elevated latencies and error rates when performing upload or write operations.",
    "status": "resolved",
    "stale": false,
    "severity": "major",
    "startedAt": "2026-10-08T12:19:00+00:00",
    "updatedAt": "2026-10-09T16:50:52+00:00",
    "resolvedAt": "2026-10-08T23:30:00+00:00",
    "provider": {
      "slug": "google-cloud",
      "name": "Google Cloud"
    },
    "affectedServices": [
      {
        "slug": "google-cloud-storage",
        "name": "Cloud Storage"
      }
    ],
    "regions": [
      "us-central1"
    ],
    "links": {
      "html": "/incidents/google-cloud-google-cloud-storage-customers-are-experiencing-elevated-latencies-and-2026-10-08-bjryysut",
      "api": "/api/v1/incidents/google-cloud-google-cloud-storage-customers-are-experiencing-elevated-latencies-and-2026-10-08-bjryysut",
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      "alerts": "https://outagedeck.com/account?stack=google-cloud&utm_source=api&utm_medium=response&utm_campaign=api_alerts&utm_content=incident"
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    "impactSummary": "Google Cloud reported a medium severity event affecting Google Cloud Storage.",
    "source": {
      "id": "source_google_cloud_status",
      "kind": "official_api",
      "name": "Google Cloud Service Health",
      "checkedAt": "2026-10-11T09:55:06.65+00:00",
      "stale": false,
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    "updates": [
      {
        "id": "update_gcp_mSFVt6PiP557bjRyYsut_20261008t1824180000",
        "status": "investigating",
        "body": "**Summary**\nGoogle Cloud Storage customers are experiencing elevated latencies and error rates when performing upload or write operations\n**Description**\nWe are experiencing an issue with Google Cloud Storage beginning on Thursday, 2026-10-08 05:19 PDT.\nOur engineering team continues to investigate the issue.\nWe will provide an update by Thursday, 2026-10-08 11:50 PDT with current details.\n**Customer Symptoms**\n* Customers are experiencing elevated latencies and error rates when performing upload or write operations.\n* A smaller subset of read operations may also experience increased latency and errors\n**Workaround**\nNone at this time.",
        "createdAt": "2026-10-08T18:24:18+00:00"
      },
      {
        "id": "update_gcp_mSFVt6PiP557bjRyYsut_20261008t1834000000",
        "status": "monitoring",
        "body": "**Summary**\nGoogle Cloud Storage customers are experiencing elevated latencies and error rates when performing upload or write operations\n**Description**\nWe are experiencing an issue with Google Cloud Storage beginning on Thursday, 2026-10-08 05:19 PDT.\nInitial mitigations applied by our engineering team leading to observable improvements in error rates in our internal monitoring. Work remains underway to roll out further mitigations.\nWe will provide an update by Thursday, 2026-10-08 12:00 PDT with current details.\n**Customer Symptoms**\n* Customers are experiencing elevated latencies and error rates when performing upload or write operations.\n* A smaller subset of read operations may also experience increased latency and errors\n**Workaround**\nNone at this time.",
        "createdAt": "2026-10-08T18:34:00+00:00"
      },
      {
        "id": "update_gcp_mSFVt6PiP557bjRyYsut_20261008t1855190000",
        "status": "monitoring",
        "body": "**Summary**\nGoogle Cloud Storage customers are experiencing elevated latencies and error rates when performing upload or write operations\n**Description**\nWe are experiencing an issue with Google Cloud Storage beginning on Thursday, 2026-10-08 05:19 PDT.\nInitial mitigations applied by our engineering team leading to observable improvements in error rates in our internal monitoring beginning 10:57 PDT. Work remains underway to roll out further mitigations.\nWe will provide an update by Thursday, 2026-10-08 12:45 PDT with current details.\n**Customer Symptoms**\n* Customers are experiencing elevated latencies and error rates when performing upload or write operations.\n* A smaller subset of read operations may also experience increased latency and errors\n**Workaround**\nNone at this time.",
        "createdAt": "2026-10-08T18:55:19+00:00"
      },
      {
        "id": "update_gcp_mSFVt6PiP557bjRyYsut_20261008t1938180000",
        "status": "monitoring",
        "body": "**Summary**\nGoogle Cloud Storage customers are experiencing elevated latencies and error rates when performing upload or write operations\n**Description**\nWe are continuing to mitigate the issue with Google Cloud Storage in the us-central1 region that began on Thursday, 2026-10-08 05:19 PDT.\nThe initial mitigations applied by our engineering team continue to show observable improvements in error rates. Our engineering team is actively monitoring the environment and rolling out further mitigations to fully stabilize the service.\nWe will provide an update by Thursday, 2026-10-08 14:00 PDT with current details.\n**Customer Symptoms**\n* Customers are experiencing elevated latencies and error rates when performing upload or write operations.\n* A smaller subset of read operations may also experience increased latency and errors\n**Workaround**\nNone at this time.",
        "createdAt": "2026-10-08T19:38:18+00:00"
      },
      {
        "id": "update_gcp_mSFVt6PiP557bjRyYsut_20261008t2048220000",
        "status": "monitoring",
        "body": "**Summary**\nGoogle Cloud Storage customers are experiencing elevated latencies and error rates when performing upload or write operations\n**Description**\nWe are continuing to mitigate the issue with Google Cloud Storage in the us-central1 region that began on Thursday, 2026-10-08 05:19 PDT.\nThe initial mitigations applied by our engineering team continue to show observable improvements in error rates.\nOur engineering team is actively monitoring the environment and rolling out further mitigations to fully stabilize the service.\nWe will provide an update by Thursday, 2026-10-08 16:00 PDT with current details.\n**Customer Symptoms**\n* Customers are experiencing elevated latencies and error rates when performing upload or write operations.\n* A smaller subset of read operations may also experience increased latency and errors\n**Workaround**\nNone at this time.",
        "createdAt": "2026-10-08T20:48:22+00:00"
      },
      {
        "id": "update_gcp_mSFVt6PiP557bjRyYsut_20261009t1644560000",
        "status": "resolved",
        "body": "## Preliminary Incident Report\nWe sincerely apologize for the disruption this incident caused to your business. We know how much you rely on Google Cloud, and we regret the impact on your productivity. We are working to address the root cause and prevent this from occurring in the future.\nPlease note, this information is based on our best knowledge at the time of posting and is subject to change as our investigation continues. A final Incident Report with preventative actions will be posted once our investigation is complete.\nIf you have experienced impact outside of what is listed below, please reach out to Google Cloud Support using [https\\://cloud.google.com/support](https://cloud.google.com/support)\n## Date/Time of the Issue (All time US/Pacific)\nIncident Start: 08 October 2026 04:00\nIncident End: 08 October 2026 16:30\nDuration: 12 hours, 30 minutes\n## Summary\nOn Thursday, 08 October 2026, Google Cloud Storage experienced elevated write latency and write error rates in the us-central1 region for a duration of 12 hours, 30 minutes. We are taking immediate steps to ensure this doesn’t happen again.\n## Preliminary Root Cause\nGoogle Cloud Storage relies on a highly distributed backend architecture to process and store incoming data. During the incident window, specific storage backend nodes within the us-central1 region experienced a localized capacity shortfall.\nThe sequence of events leading to customer impact was as follows:\n* A traffic sorting optimization intended to address localized capacity constraints caused severe resource exhaustion on specific backend storage nodes in the affected region.\n* This resource exhaustion caused backend services handling object data ingestion to begin timing out.\n* As a result, incoming upload and write requests routed to these nodes experienced elevated latency and failed to complete, resulting in errors surfaced to customers.\n* Concurrently, a separate issue with the underlying database service contributed to additional metadata processing errors during a portion of the incident window.\nGoogle engineers have begun a full root cause analysis (RCA) and will provide additional information once it is available.\n## Remediation\nThe issue was initially detected by Google engineering teams actively monitoring system telemetry early in the incident window.\nTo mitigate the issue, Google engineers executed the following step-by-step strategy:\n* Engineers initially attempted to dynamically allocate additional emergency capacity to the affected region, but this was blocked by systemic regional capacity limits.\n* To relieve immediate pressure, engineers selectively drained traffic from the most overloaded backend storage nodes.\n* A configuration change was deployed to disable the traffic sorting optimization, significantly reducing resource overhead on the storage backend.\n* For the concurrent metadata issue, engineers rolled back a recent update to the underlying metadata database service.\nOnce traffic levels stabilized and resource utilization returned to normal baseline levels, the previously drained nodes were restored to active service, successfully restoring normal operations.\n## Description of Impact\nOn 08 October, 2026, from 04:00 to 16:30 US/Pacific, customers utilizing the us-central1 region experienced elevated latency and error rates during Cloud Storage upload and write operations.\n* Customers primarily observed HTTP 503 UNAVAILABLE errors on WriteObject operations and client-side timeouts.\n* A minor impact was also observed on read operations during this timeframe.\n* Cloud Storage operations in all other regions, as well as all other Google Cloud services, remained unaffected by this specific event.",
        "createdAt": "2026-10-09T16:44:56+00:00"
      }
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