dp_010 q04 991 files multi_hop Codex

What was the reported root cause of 'The Great Slowdown' incident, and which engineer was assigned to optimize the specific SQL query responsible?

Gold answer

A runaway PostgreSQL query. Leo Martinez was assigned to optimize it.

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Input
1.2M
Output
7k
Steps
1
Tools
22
Latency
2.2m
Cost
$14.54
#1 Ran rg -n "Great Slowdown|slowdown|root cause|SQL|query|optimize|assigned|engineer" agent_memory 1,043,756 chars
Command command_execution
rg -n "Great Slowdown|slowdown|root cause|SQL|query|optimize|assigned|engineer" agent_memory
Result 1 lines
agent_memory/support/tickets/CX-4855_startuphub_technical_feedback_on_nova_beta.md:11:**Chief Complaint (CC):** Received detailed technical feedback from Alice Wu, lead engineer at StartupHub, regarding the Project Nova beta platform. Ms. Wu's feedback is primarily constructive and focused on API architecture, performance, and potential integration points. This is not a typical bug report; it’s mo…
#1 Ran rg -n -i "the great slowdown|great slowdown|slowdown incident|incident report|post[- ]mortem|root cause" agent_memory 1,044,416 chars
Command command_execution
rg -n -i "the great slowdown|great slowdown|slowdown incident|incident report|post[- ]mortem|root cause" agent_memory
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agent_memory/email/internal/EOD_status_CX-4815_2023-11-17.md:9:Apologies for the late-night email, it’s almost midnight here and I know it’s late for you all too, but I wanted to provide a comprehensive status update on the CX-4815 incident impacting Innovate Inc.'s data. It's been a long, frankly exhausting day, and this has been a pretty stressful week overall for the team, but we've finally man…
#1 Ran find agent_memory -type f | sed 's#"'^#/#'"' | rg -i \"slow|incident|postmortem|post-mortem|database|query|sql\" 4,923 chars
Command command_execution
find agent_memory -type f | sed 's#"'^#/#'"' | rg -i \"slow|incident|postmortem|post-mortem|database|query|sql\"
Result 6 lines
/agent_memory/projects/nova/2023-09-12_incident_remediation_jira_board.md
/agent_memory/projects/nova/database_schema_initial_draft.md
/agent_memory/projects/nova/database_migration_plan_v3.5.0.md
/agent_memory/projects/nova/query_optimization_plan_pre-beta.md
/agent_memory/projects/nova/remediation_tickets/PLAT-1138_add_db_query_timeouts.md
/agent_memory/projects/nova/remediation_tickets/PLAT-113…
#1 Ran rg -n -i "assigned to|owner|optimi[sz]e|slow query|specific SQL|SQL query|query responsible|query plan" agent_memory 1,047,634 chars
Command command_execution
rg -n -i "assigned to|owner|optimi[sz]e|slow query|specific SQL|SQL query|query responsible|query plan" agent_memory
Result 1 lines
agent_memory/tickets/NOVA-284_hotfix_data_corruption_cx4815.md:60:Looking at the commit history for `UserPreferencesService`, the last significant change was about 3 weeks ago, part of the `feat/pref-performance-optimization` branch (commit hash `a1b2c3d4e5f6`). It seems like that commit might have optimized the read path but didn't account for the write contention. I’ll ask Leo to dig deeper into…
#1 Ran nl -ba agent_memory/docs/post_mortems/pm-2023-005_great_slowdown.md | sed -n '1,220p' 36,468 chars
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nl -ba agent_memory/docs/post_mortems/pm-2023-005_great_slowdown.md | sed -n '1,220p'
Result 12 lines
     1	# Post-Mortem: PM-2023-005 - "The Great Slowdown"
     2	
     3	**Date Published:** 2023-09-11
     4	**Incident Start:** 2023-09-02 14:35 UTC
     5	**Incident Resolved:** 2023-09-02 17:55 UTC
     6	**Total Duration:** 3 hours 20 minutes
     7	**Authors:** Fatima Ahmed (Senior SRE), Alex Chen (Engineering Lead)
     8	**Status:** Final
     9	
    10	## Table of Contents
    11	
    12	…
#1 Ran nl -ba agent_memory/projects/nova/2023-09-12_incident_remediation_jira_board.md | sed -n '1,220p' 18,356 chars
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nl -ba agent_memory/projects/nova/2023-09-12_incident_remediation_jira_board.md | sed -n '1,220p'
Result 12 lines
     1	# Nova Project - Incident Remediation Board
     2	
     3	**Date:** 2023-09-12
     4	**Author:** Sam Taylor (sam.taylor@connectsphere.com)
     5	**Project:** Nova Incident Remediation (Post-"Great Slowdown" Post-Mortem Actions)
     6	
     7	---
     8	
     9	## Table of Contents
    10	
    11	1.  [Introduction](#introduction)
    12	2.  [Project Board Overview](#project-board-overvie…
#1 Ran nl -ba agent_memory/email/internal/slowdown_remediation_assignments.md | sed -n '1,220p' 20,562 chars
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nl -ba agent_memory/email/internal/slowdown_remediation_assignments.md | sed -n '1,220p'
Result 9 lines
     1	From: alex.chen@connectsphere.com
     2	To: ben.carter@connectsphere.com, leo.martinez@connectsphere.com, fatima.ahmed@connectsphere.com
     3	Cc: core-platform-team@connectsphere.com
     4	Date: Tue, 12 Sep 2023 10:03:15 -0700
     5	Subject: Core Platform: Post-Mortem Action Items & Assignments (PM-2023-005)
     6	
     7	Team,
     8	
     9	Hope everyone’s Tuesday is off to a good s…
#1 Ran nl -ba agent_memory/projects/nova/remediation_tickets/PLAT-1140_optimize_customer_report_query.md | sed -n '1,220p' 15,746 chars
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nl -ba agent_memory/projects/nova/remediation_tickets/PLAT-1140_optimize_customer_report_query.md | sed -n '1,220p'
Result 11 lines
     1	# PLAT-1140: Investigate and Optimize Customer Report Query
     2	
     3	**Project:** Nova
     4	**Component:** Reporting Engine
     5	**Reporter:** fatima_ahmed
     6	**Assignee:** leo.martinez@connectsphere.com
     7	**Priority:** Highest
     8	**Status:** Open
     9	**Labels:** performance, sql, optimization, post-mortem, incident-response, PLAT-1140
    10	
    11	## Description…
#1 Ran find agent_memory/projects/nova/remediation_tickets -type f -maxdepth 1 -print 431 chars
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find agent_memory/projects/nova/remediation_tickets -type f -maxdepth 1 -print
Result 5 lines
agent_memory/projects/nova/remediation_tickets/PLAT-1142_load_test_reporting_dashboard.md
agent_memory/projects/nova/remediation_tickets/PLAT-1138_add_db_query_timeouts.md
agent_memory/projects/nova/remediation_tickets/PLAT-1141_review_escalation_policy.md
agent_memory/projects/nova/remediation_tickets/PLAT-1139_improve_query_alerting.md
agent_memory/projects/nova/remediation_tickets/PLAT-1140_opt…
#1 Ran nl -ba agent_memory/email/internal/postmortem_published_pm-2023-005.md | sed -n '1,220p' 15,014 chars
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nl -ba agent_memory/email/internal/postmortem_published_pm-2023-005.md | sed -n '1,220p'
Result 8 lines
     1	From: fatima.ahmed@connectsphere.com
     2	To: engineering-all@connectsphere.com
     3	Date: Mon, 11 Sep 2023 10:05:32 -0700
     4	Subject: FINAL: Post-Mortem Published - PM-2023-005 (Nova Service Outage)
     5	
     6	Team,
     7	
     8	I'm pleased to announce that the final post-mortem document for the Nova service outage, PM-2023-005, has been published and is now available for rev…
#1 Ran rg -n -i "reported root cause|root cause.*Great Slowdown|Great Slowdown.*root cause|PM-2023-005|PLAT-1140|PLAT-1141|specific query|primary c… 286,961 chars
Command command_execution
rg -n -i "reported root cause|root cause.*Great Slowdown|Great Slowdown.*root cause|PM-2023-005|PLAT-1140|PLAT-1141|specific query|primary culprit|customer_report|Leo Martinez" agent_memory/docs agent_memory/email agent_memory/projects agent_memory/meetings agent_memory/slack
Result 1 lines
agent_memory/slack/eng-incidents/2023-09-09_follow_up_alerts.md:9:[2023-09-09 10:05] @fatima_ahmed: Exactly! I'm still re-reading the post-mortem for PM-2023-005, trying to catch anything we might have missed in the initial panic. Alex Chen wants a full debrief next Tuesday, and I want to be able to answer any lingering questions about our monitoring setup and what triggered that runaway query. It…
#1 Ran nl -ba agent_memory/meetings/planning/2023-09-14_great_slowdown_postmortem_review.md | sed -n '1,240p' 426,211 chars
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nl -ba agent_memory/meetings/planning/2023-09-14_great_slowdown_postmortem_review.md | sed -n '1,240p'
Result 11 lines
     1	# Post-Mortem Review: The Great Slowdown (PM-2023-005) - Engineering All-Hands Meeting
     2	
     3	**Date:** September 14, 2023
     4	**Time:** 10:00 AM - 11:30 AM PST
     5	**Location:** Virtual (Zoom)
     6	**Author:** Sam Taylor (Engineering Project Coordinator, Core Platform Team)
     7	
     8	## Attendees
     9	
    10	*   Fatima Ahmed (Senior SRE Lead)
    11	*   Leo Chen (St…
#1 Ran find agent_memory -maxdepth 3 -type f | sed 's#"'^#/#'"' | rg -i \"answer|question|qa|root|slowdown|1140|1141|great\" 2,261 chars
Command command_execution
find agent_memory -maxdepth 3 -type f | sed 's#"'^#/#'"' | rg -i \"answer|question|qa|root|slowdown|1140|1141|great\"
Result 6 lines
/agent_memory/projects/nova/bug_investigation_CX-4815_root_cause_analysis.md
/agent_memory/projects/nova/2023-12-08_qa_and_testing_plan_ga.md
/agent_memory/docs/internal/securescan_q4_questionnaire_responses.md
/agent_memory/docs/post_mortems/pm-2023-005_great_slowdown.md
/agent_memory/slack/#deal-desk-nova/2023-10-18_technical_presales_questions.md
/agent_memory/slack/#eng-platform/2023-09-15_api…
#1 Ran nl -ba agent_memory/email/internal/deep_dive_runaway_query_logs.md | sed -n '1,260p' 21,489 chars
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nl -ba agent_memory/email/internal/deep_dive_runaway_query_logs.md | sed -n '1,260p'
Result 10 lines
     1	From: ben.carter@connectsphere.com
     2	To: alex.chen@connectsphere.com
     3	Date: Wed, 6 Sep 2023 10:15:23 -0700
     4	Subject: Fwd: urgent: runaway query!
     5	
     6	---------- Forwarded message ----------
     7	From: support-team@connectsphere.com
     8	Date: Wed, 6 Sep 2023 09:30:00 -0700
     9	Subject: urgent: runaway query!
    10	To: core-platform@connectsphere.com, ops-a…
#1 Ran nl -ba agent_memory/meetings/incident_response/2023-09-10_slowdown_postmortem_meeting_notes.md | sed -n '1,260p' 428,094 chars
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nl -ba agent_memory/meetings/incident_response/2023-09-10_slowdown_postmortem_meeting_notes.md | sed -n '1,260p'
Result 13 lines
     1	# Incident Post-Mortem: "The Great Slowdown" - 2023-09-10
     2	
     3	## Meeting Details
     4	
     5	*   **Date:** 2023-09-10
     6	*   **Time:** 10:00 AM - 12:00 PM PST
     7	*   **Location:** ConnectSphere Virtual Conference Room (Zoom)
     8	*   **Meeting Lead:** Alex Chen
     9	*   **Note Taker:** Sam Taylor (Core Platform Team)
    10	
    11	## Attendees
    12	
    13	*   A…
#1 Ran nl -ba agent_memory/meetings/incident_response/2023-09-03_slowdown_war_room_transcript.md | sed -n '1,300p' 27,554 chars
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nl -ba agent_memory/meetings/incident_response/2023-09-03_slowdown_war_room_transcript.md | sed -n '1,300p'
Result 11 lines
     1	[09:00:01] MAYA SINGH: Alright everyone, thanks for joining on short notice. Alex, can you give us a quick roll call?
     2	
     3	[09:00:05] ALEX CHEN: Will do. We have Ben Carter here.
     4	
     5	[09:00:07] BEN CARTER: Present.
     6	
     7	[09:00:08] ALEX CHEN: Fatima Ahmed is here as well.
     8	
     9	[09:00:10] FATIMA AHMED: Here.
    10	
    11	[09:00:11] ALEX CHEN: And mys…
#1 Ran nl -ba agent_memory/email/internal/incident_resolved_slowdown_2023-09-03.md | sed -n '1,220p' 24,635 chars
Command command_execution
nl -ba agent_memory/email/internal/incident_resolved_slowdown_2023-09-03.md | sed -n '1,220p'
Result 8 lines
     1	From: maya.singh@connectsphere.com
     2	To: all-company@connectsphere.com
     3	Date: Sun, 03 Sep 2023 18:15:43 -0700
     4	Subject: Update: Incident Resolved - Performance Degradation
     5	
     6	Team,
     7	
     8	I'm writing to share that the performance degradation incident impacting our core services has been resolved. This has been a rough day for everyone, and I know many of…
#1 Ran nl -ba agent_memory/email/internal/cx_guidance_on_slowdown_incident.md | sed -n '1,220p' 18,628 chars
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nl -ba agent_memory/email/internal/cx_guidance_on_slowdown_incident.md | sed -n '1,220p'
Result 8 lines
     1	From: kevin.harris@connectsphere.com
     2	To: cx-team@connectsphere.com
     3	Date: Sun, 03 Sep 2023 11:05:17 -0600
     4	Subject: Official Guidance: Response Protocol for Current Performance Degradation
     5	
     6	Team,
     7	
     8	I know this past weekend has been particularly challenging, and I want to start by thanking each and every one of you for your dedication and hard wo…
#1 Ran nl -ba agent_memory/support/tickets/CX-4591_retailgiant_co_complaint_about_september_incident.md | sed -n '1,180p' 29,305 chars
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nl -ba agent_memory/support/tickets/CX-4591_retailgiant_co_complaint_about_september_incident.md | sed -n '1,180p'
Result 11 lines
     1	MRN: 87654321
     2	DOB: 1978-05-15
     3	Encounter Date: 2023-09-04
     4	Provider: Emily Clark, CX Specialist
     5	Clinic: ConnectSphere Support - Tier 2 Escalations
     6	
     7	---
     8	
     9	**Subjective:**
    10	
    11	Pt presents today via support ticket submission portal, timestamped 2023-09-04 at 09:17 AM MST. Pt identifies as Bob Anderson, primary contact and VP of Op…
#1 Ran nl -ba agent_memory/docs/internal/cx_weekly_highlights_2023-09-08.md | sed -n '70,120p' 7,320 chars
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nl -ba agent_memory/docs/internal/cx_weekly_highlights_2023-09-08.md | sed -n '70,120p'
Result 1 lines
    70	*   **Impact on Key Accounts**: We received direct, urgent communications from several of our enterprise clients, including RetailGiant Co. (their complaint is detailed in [f818](data/email/customers/retailgiant_co_complaint_during_incident_2023-09-03.md)), who reported significant financial losses due to the inability to process orders and manage inventory effectively during the outage. Bo…
#1 Ran nl -ba agent_memory/email/internal/cx_request_for_incident_summary.md | sed -n '1,220p' 16,554 chars
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nl -ba agent_memory/email/internal/cx_request_for_incident_summary.md | sed -n '1,220p'
Result 10 lines
     1	From: Kevin Harris <kevin.harris@connectsphere.com>
     2	To: Maya Singh <maya.singh@connectsphere.com>
     3	Date: Tue, 12 Sep 2023 09:15:02 -0600
     4	Subject: URGENT: Customer Impact Summary Needed - The Great Slowdown (Incident REF-002)
     5	
     6	Maya,
     7	
     8	Hope you’re having a decent start to the week, all things considered.
     9	
    10	I’m writing to follow up on…
#1 Ran nl -ba agent_memory/docs/playbooks/customer_facing_incident_report_2023-09-02.md | sed -n '1,220p' 34,222 chars
Command command_execution
nl -ba agent_memory/docs/playbooks/customer_facing_incident_report_2023-09-02.md | sed -n '1,220p'
Result 12 lines
     1	# ConnectSphere Service Incident Report - September 2, 2023
     2	
     3	**Document Status:** DRAFT
     4	**Authors:** Alex Chen, Priya Desai
     5	**Date:** September 13, 2023
     6	**Audience:** Internal (for Customer-Facing Use)
     7	
     8	## Table of Contents
     9	
    10	1.  [Introduction](#introduction)
    11	2.  [What Happened](#what-happened)
    12	    *   [Timeline of …
Answer
The reported root cause was an inefficient, resource-heavy PostgreSQL query in the customer reporting/database access path. It triggered a bad execution plan under load, consuming excessive CPU/memory and causing widespread slowdown. The engineer assigned to optimize the responsible SQL query was **Leo Martinez**. See [PM-2023-005](/Users/prasanna/Documents/supermemoryai/supermemoryfs/.scratch/eval/eval/workspace/fs/dp_010/agent_memory/docs/post_mortems/pm-2023-005_great_slowdown.md:61) and [PL…
Judge: covers all asked facts
SMFS Won View raw JSON
Input
347k
Output
4k
Steps
1
Tools
10
Latency
2.0m
Cost
$4.28
#1 Ran smfs grep "The Great Slowdown incident root cause SQL query engineer assigned optimize" . 7,185 chars
Command command_execution
smfs grep "The Great Slowdown incident root cause SQL query engineer assigned optimize" .
Result 5 lines
# supermemory semantic search — 10 results for "The Great Slowdown incident root cause SQL query engineer assigned optimize"
# searches by meaning across files in this container. usage:
#   grep "natural language query"          search all files
#   grep "query" path/to/dir/              search within directory
# output: <filepath>:<line_start>-<line_end>:<chunk> (chunk text is verbatim from the f…
#1 Ran rg -n "Great Slowdown|slowdown|root cause|SQL query|optimize" . 736,983 chars
Command command_execution
rg -n "Great Slowdown|slowdown|root cause|SQL query|optimize" .
Result 1 lines
./1on1/alex-chen_sam-taylor/2023-09-15.md:32:*   **Prioritize Ruthlessly:** Not all action items are created equal. We need to identify the absolute highest-impact, highest-risk items that *must* be addressed immediately. These are likely the monitoring/alerting gaps and the circuit breaker implementation, as they directly address the root causes of the incident's severity. The database tuning and…
#1 Ran nl -ba docs/post_mortems/pm-2023-005_great_slowdown.md | sed -n '1,130p' 15,740 chars
Command command_execution
nl -ba docs/post_mortems/pm-2023-005_great_slowdown.md | sed -n '1,130p'
Result 12 lines
     1	# Post-Mortem: PM-2023-005 - "The Great Slowdown"
     2	
     3	**Date Published:** 2023-09-11
     4	**Incident Start:** 2023-09-02 14:35 UTC
     5	**Incident Resolved:** 2023-09-02 17:55 UTC
     6	**Total Duration:** 3 hours 20 minutes
     7	**Authors:** Fatima Ahmed (Senior SRE), Alex Chen (Engineering Lead)
     8	**Status:** Final
     9	
    10	## Table of Contents
    11	
    12	…
#1 Ran nl -ba email/internal/slowdown_remediation_assignments.md | sed -n '1,160p' 15,769 chars
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nl -ba email/internal/slowdown_remediation_assignments.md | sed -n '1,160p'
Result 9 lines
     1	From: alex.chen@connectsphere.com
     2	To: ben.carter@connectsphere.com, leo.martinez@connectsphere.com, fatima.ahmed@connectsphere.com
     3	Cc: core-platform-team@connectsphere.com
     4	Date: Tue, 12 Sep 2023 10:03:15 -0700
     5	Subject: Core Platform: Post-Mortem Action Items & Assignments (PM-2023-005)
     6	
     7	Team,
     8	
     9	Hope everyone’s Tuesday is off to a good s…
#1 Ran nl -ba docs/post_mortems/pm-2023-005_rca_deep_dive.md | sed -n '55,90p' 4,426 chars
Command command_execution
nl -ba docs/post_mortems/pm-2023-005_rca_deep_dive.md | sed -n '55,90p'
Result 5 lines
    55	---
    56	
    57	## 1. Introduction
    58	
    59	This document provides a detailed technical analysis of the incident identified as 'The Great Slowdown', which occurred on September 5th, 2023. This incident resulted in widespread performance degradation across multiple ConnectSphere services, primarily impacting read operations and user-facing features. The primary investigation focused…
#1 Ran nl -ba projects/nova/remediation_tickets/PLAT-1140_optimize_customer_report_query.md | sed -n '1,120p' 7,835 chars
Command command_execution
nl -ba projects/nova/remediation_tickets/PLAT-1140_optimize_customer_report_query.md | sed -n '1,120p'
Result 11 lines
     1	# PLAT-1140: Investigate and Optimize Customer Report Query
     2	
     3	**Project:** Nova
     4	**Component:** Reporting Engine
     5	**Reporter:** fatima_ahmed
     6	**Assignee:** leo.martinez@connectsphere.com
     7	**Priority:** Highest
     8	**Status:** Open
     9	**Labels:** performance, sql, optimization, post-mortem, incident-response, PLAT-1140
    10	
    11	## Description…
#1 Ran rg -n "Great Slowdown|PM-2023-005|PLAT-1140|customer_report|customer reporting|stale statistics|posts table|ANY operator|Monthly Active User… 293,476 chars
Command command_execution
rg -n "Great Slowdown|PM-2023-005|PLAT-1140|customer_report|customer reporting|stale statistics|posts table|ANY operator|Monthly Active Users" docs projects email slack 1on1 memo tickets support 2>/dev/null
Result 3 lines
tickets/NOVA-284_hotfix_data_corruption_cx4815.md:222:    *   Check in with the customer reporting **CX-4815** to confirm if they are still experiencing issues. (Need to coordinate this with Support).
memo/cto_memo_on_reliability.md:6:RE: Reflecting on "The Great Slowdown" and Our Renewed Commitment to Reliability
memo/cto_memo_on_reliability.md:10:I wanted to take some time to share some thoughts…
#1 Ran smfs grep "Great Slowdown stale statistics posts table assigned engineer query optimization" . 8,896 chars
Command command_execution
smfs grep "Great Slowdown stale statistics posts table assigned engineer query optimization" .
Result 5 lines
# supermemory semantic search — 10 results for "Great Slowdown stale statistics posts table assigned engineer query optimization"
# searches by meaning across files in this container. usage:
#   grep "natural language query"          search all files
#   grep "query" path/to/dir/              search within directory
# output: <filepath>:<line_start>-<line_end>:<chunk> (chunk text is verbatim from …
#1 Ran smfs grep "reported root cause Great Slowdown assigned engineer optimize SQL query responsible customer_report PLAT-1140" . 8,622 chars
Command command_execution
smfs grep "reported root cause Great Slowdown assigned engineer optimize SQL query responsible customer_report PLAT-1140" .
Result 5 lines
# supermemory semantic search — 10 results for "reported root cause Great Slowdown assigned engineer optimize SQL query responsible customer_report PLAT-1140"
# searches by meaning across files in this container. usage:
#   grep "natural language query"          search all files
#   grep "query" path/to/dir/              search within directory
# output: <filepath>:<line_start>-<line_end>:<chunk> …
#1 Ran nl -ba docs/post_mortems/pm-2023-005_great_slowdown.md | sed -n '150,168p' 6,575 chars
Command command_execution
nl -ba docs/post_mortems/pm-2023-005_great_slowdown.md | sed -n '150,168p'
Result 7 lines
   150	
   151	---
   152	
   153	## 6. Lessons Learned & Corrective Actions
   154	
   155	This incident highlighted several areas for improvement in our systems, processes, and tooling. The following table outlines the key corrective actions identified, along with assigned owners and target due dates. These actions are tracked in our internal ticketing system (Jira, referenced as PLAT-XXXX).
   …
Answer
The reported root cause was a single poorly optimized PostgreSQL/customer reporting SQL query that consumed excessive database CPU/I/O and cascaded into platform-wide slowdown. The engineer assigned to optimize the responsible query was **Leo Martinez**. See the assignment in [PLAT-1140](/Users/prasanna/Documents/supermemoryai/supermemoryfs/.scratch/eval/eval/workspace/smfs/dp_010/agent_memory/projects/nova/remediation_tickets/PLAT-1140_optimize_customer_report_query.md:6) and the action email …
Judge: covers all asked facts