The Change Point system has detected an improvement. This should be investigated.

Evergreen Task link: https://evergreen.mongodb.com/task/wiredtiger_ubuntu2004_perf_tests_arm64_perf_test_update_large_record_btree_9efd248d88d9bda44e5dd07439be893423195499_24_01_18_04_27_33

Screenshot:

// Optional
Further details: https://performance-monitoring-and-analysis.server-tig.prod.corp.mongodb.com/baron?change_point_filters=%5B%7B%22active%22%3Atrue%2C%22name%22%3A%22commit%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%229efd248d88d9bda44e5dd07439be893423195499%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22commit_date%22%2C%22operator%22%3A%22after%22%2C%22type%22%3A%22date%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22project%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%5Ewiredtiger%24%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22variant%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%5Eubuntu2004%5C%5C-perf%5C%5C-tests%5C%5C-arm64%24%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22task%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%5Eperf%5C%5C-test%5C%5C-update%5C%5C-large%5C%5C-record%5C%5C-btree%24%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22test%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%5Eupdate%5C%5C-large%5C%5C-record%5C%5C-btree%5C%5C.wtperf%24%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22measurement%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%5ELoad%5C%5C%20time%24%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22percent_change%22%2C%22operator%22%3A%22gt%22%2C%22type%22%3A%22number%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22z_score_change%22%2C%22operator%22%3A%22gt%22%2C%22type%22%3A%22number%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22h_score%22%2C%22operator%22%3A%22gt%22%2C%22type%22%3A%22number%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22absolute_change%22%2C%22operator%22%3A%22gt%22%2C%22type%22%3A%22number%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22build_failures%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22bf_suggestions%22%2C%22operator%22%3A%22inlist%22%2C%22type%22%3A%22listSelect%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22triage_status%22%2C%22operator%22%3A%22inlist%22%2C%22type%22%3A%22listSelect%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22changeType%22%2C%22operator%22%3A%22eq%22%2C%22type%22%3A%22select%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22triage_contexts%22%2C%22operator%22%3A%22inlist%22%2C%22type%22%3A%22listSelect%22%7D%5D

Note: this commit (9efd248) removes a bunch of unused stats, so DB size decreasing might be expected. But this shrinkage seems like a lot. There are several other associated changepoints:

• https://performance-monitoring-and-analysis.server-tig.prod.corp.mongodb.com/baron?change_point_filters=%5B%7B%22active%22%3Atrue%2C%22name%22%3A%22commit%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%229efd248d88d9bda44e5dd07439be893423195499%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22commit_date%22%2C%22operator%22%3A%22after%22%2C%22type%22%3A%22date%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22project%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%5Ewiredtiger%24%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22variant%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%5Eubuntu2004%5C%5C-perf%5C%5C-tests%5C%5C-arm64%24%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22task%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%5Eperf%5C%5C-test%5C%5C-mongodb%5C%5C-small%5C%5C-oplog%24%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22test%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%5Emongodb%5C%5C-small%5C%5C-oplog%5C%5C.wtperf%24%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22measurement%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%5ELoad%5C%5C%20time%24%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22percent_change%22%2C%22operator%22%3A%22gt%22%2C%22type%22%3A%22number%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22z_score_change%22%2C%22operator%22%3A%22gt%22%2C%22type%22%3A%22number%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22h_score%22%2C%22operator%22%3A%22gt%22%2C%22type%22%3A%22number%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22absolute_change%22%2C%22operator%22%3A%22gt%22%2C%22type%22%3A%22number%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22build_failures%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22bf_suggestions%22%2C%22operator%22%3A%22inlist%22%2C%22type%22%3A%22listSelect%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22triage_status%22%2C%22operator%22%3A%22inlist%22%2C%22type%22%3A%22listSelect%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22changeType%22%2C%22operator%22%3A%22eq%22%2C%22type%22%3A%22select%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22triage_contexts%22%2C%22operator%22%3A%22inlist%22%2C%22type%22%3A%22listSelect%22%7D%5D
• https://performance-monitoring-and-analysis.server-tig.prod.corp.mongodb.com/baron?change_point_filters=%5B%7B%22active%22%3Atrue%2C%22name%22%3A%22commit%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%229efd248d88d9bda44e5dd07439be893423195499%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22commit_date%22%2C%22operator%22%3A%22after%22%2C%22type%22%3A%22date%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22project%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%5Ewiredtiger%24%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22variant%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%5Eubuntu2004%5C%5C-perf%5C%5C-tests%5C%5C-arm64%24%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22task%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%5Eperf%5C%5C-test%5C%5C-mongodb%5C%5C-oplog%24%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22test%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%5Emongodb%5C%5C-oplog%5C%5C.wtperf%24%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22measurement%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%5EDatabase%5C%5C%20Size%5C%5C%20%5C%5C(in%5C%5C%20bytes%5C%5C)%24%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22percent_change%22%2C%22operator%22%3A%22gt%22%2C%22type%22%3A%22number%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22z_score_change%22%2C%22operator%22%3A%22gt%22%2C%22type%22%3A%22number%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22h_score%22%2C%22operator%22%3A%22gt%22%2C%22type%22%3A%22number%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22absolute_change%22%2C%22operator%22%3A%22gt%22%2C%22type%22%3A%22number%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22build_failures%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22bf_suggestions%22%2C%22operator%22%3A%22inlist%22%2C%22type%22%3A%22listSelect%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22triage_status%22%2C%22operator%22%3A%22inlist%22%2C%22type%22%3A%22listSelect%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22changeType%22%2C%22operator%22%3A%22eq%22%2C%22type%22%3A%22select%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22triage_contexts%22%2C%22operator%22%3A%22inlist%22%2C%22type%22%3A%22listSelect%22%7D%5D
• https://performance-monitoring-and-analysis.server-tig.prod.corp.mongodb.com/baron?change_point_filters=%5B%7B%22active%22%3Atrue%2C%22name%22%3A%22commit%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%229efd248d88d9bda44e5dd07439be893423195499%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22commit_date%22%2C%22operator%22%3A%22after%22%2C%22type%22%3A%22date%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22project%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%5Ewiredtiger%24%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22variant%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%5Eubuntu2004%5C%5C-perf%5C%5C-tests%5C%5C-arm64%24%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22task%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%5Eperf%5C%5C-test%5C%5C-mongodb%5C%5C-large%5C%5C-oplog%24%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22test%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%5Emongodb%5C%5C-large%5C%5C-oplog%5C%5C.wtperf%24%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22measurement%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%5ELoad%5C%5C%20time%24%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22percent_change%22%2C%22operator%22%3A%22gt%22%2C%22type%22%3A%22number%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22z_score_change%22%2C%22operator%22%3A%22gt%22%2C%22type%22%3A%22number%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22h_score%22%2C%22operator%22%3A%22gt%22%2C%22type%22%3A%22number%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22absolute_change%22%2C%22operator%22%3A%22gt%22%2C%22type%22%3A%22number%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22build_failures%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22bf_suggestions%22%2C%22operator%22%3A%22inlist%22%2C%22type%22%3A%22listSelect%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22triage_status%22%2C%22operator%22%3A%22inlist%22%2C%22type%22%3A%22listSelect%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22changeType%22%2C%22operator%22%3A%22eq%22%2C%22type%22%3A%22select%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22triage_contexts%22%2C%22operator%22%3A%22inlist%22%2C%22type%22%3A%22listSelect%22%7D%5D
• https://performance-monitoring-and-analysis.server-tig.prod.corp.mongodb.com/baron?change_point_filters=%5B%7B%22active%22%3Atrue%2C%22name%22%3A%22commit%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%229efd248d88d9bda44e5dd07439be893423195499%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22commit_date%22%2C%22operator%22%3A%22after%22%2C%22type%22%3A%22date%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22project%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%5Ewiredtiger%24%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22variant%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%5Eubuntu2004%5C%5C-perf%5C%5C-tests%5C%5C-arm64%24%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22task%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%5Eperf%5C%5C-test%5C%5C-modify%5C%5C-large%5C%5C-record%5C%5C-btree%24%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22test%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%5Emodify%5C%5C-large%5C%5C-record%5C%5C-btree%5C%5C.wtperf%24%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22measurement%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%5ELoad%5C%5C%20time%24%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22percent_change%22%2C%22operator%22%3A%22gt%22%2C%22type%22%3A%22number%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22z_score_change%22%2C%22operator%22%3A%22gt%22%2C%22type%22%3A%22number%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22h_score%22%2C%22operator%22%3A%22gt%22%2C%22type%22%3A%22number%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22absolute_change%22%2C%22operator%22%3A%22gt%22%2C%22type%22%3A%22number%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22build_failures%22%2C%22operator%22%3A%22matches%22%2C%22type%22%3A%22regex%22%2C%22value%22%3A%22%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22bf_suggestions%22%2C%22operator%22%3A%22inlist%22%2C%22type%22%3A%22listSelect%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22triage_status%22%2C%22operator%22%3A%22inlist%22%2C%22type%22%3A%22listSelect%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22changeType%22%2C%22operator%22%3A%22eq%22%2C%22type%22%3A%22select%22%7D%2C%7B%22active%22%3Atrue%2C%22name%22%3A%22triage_contexts%22%2C%22operator%22%3A%22inlist%22%2C%22type%22%3A%22listSelect%22%7D%5D