fix bg stats invalid memory access [release-7.2]

[jzhou77]

Cherrypick #8507 #8701 #8773

20221110-032337-jzhou-735fcc17b2c3e1b0

Code-Reviewer Section

The general pull request guidelines can be found here.

Please check each of the following things and check all boxes before accepting a PR.

• The PR has a description, explaining both the problem and the solution.
• The description mentions which forms of testing were done and the testing seems reasonable.
• Every function/class/actor that was touched is reasonably well documented.

For Release-Branches

If this PR is made against a release-branch, please also check the following:

• This change/bugfix is a cherry-pick from the next younger branch (younger release-branch or main if this is the youngest branch)
• There is a good reason why this PR needs to go into a release branch and this reason is documented (either in the description above or in a linked GitHub issue)

[foundationdb-ci]

Result of foundationdb-pr-clang on Linux CentOS 7

• Commit ID: 1143658
• Duration 0:22:11
• Result: ❌ FAILED
• Error: Error while executing command: ctest -j ${NPROC} --no-compress-output -T test --output-on-failure. Reason: exit status 8
• Build Logs (available for 30 days)
• Build Artifact (available for 30 days)

[foundationdb-ci]

Result of foundationdb-pr on Linux CentOS 7

• Commit ID: 1143658
• Duration 0:26:43
• Result: ❌ FAILED
• Error: Error while executing command: ctest -j ${NPROC} --no-compress-output -T test --output-on-failure. Reason: exit status 8
• Build Logs (available for 30 days)
• Build Artifact (available for 30 days)

[fdb-windows-ci]

Doxense CI Report for Windows 10

• Commit ID: 1143658
• Result: ✔️ SUCCEEDED
• Build Logs (available for 30 days)

[foundationdb-ci]

Result of foundationdb-pr-cluster-tests on Linux CentOS 7

• Commit ID: 1143658
• Duration 1:15:25
• Result: ✅ SUCCEEDED
• Error: N/A
• Build Logs (available for 30 days)
• Build Artifact (available for 30 days)

[fdb-windows-ci]

Doxense CI Report for Windows 10

• Commit ID: f412d6b
• Result: ✔️ SUCCEEDED
• Build Logs (available for 30 days)

[foundationdb-ci]

Result of foundationdb-pr-clang on Linux CentOS 7

• Commit ID: f412d6b
• Duration 0:39:47
• Result: ✅ SUCCEEDED
• Error: N/A
• Build Logs (available for 30 days)
• Build Artifact (available for 30 days)

[foundationdb-ci]

Result of foundationdb-pr on Linux CentOS 7

• Commit ID: f412d6b
• Duration 0:42:05
• Result: ✅ SUCCEEDED
• Error: N/A
• Build Logs (available for 30 days)
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[fdb-windows-ci]

Doxense CI Report for Windows 10

• Commit ID: ca96d70
• Result: ✔️ SUCCEEDED
• Build Logs (available for 30 days)

[foundationdb-ci]

Result of foundationdb-pr-cluster-tests on Linux CentOS 7

• Commit ID: f412d6b
• Duration 1:13:50
• Result: ✅ SUCCEEDED
• Error: N/A
• Build Logs (available for 30 days)
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[foundationdb-ci]

Result of foundationdb-pr on Linux CentOS 7

• Commit ID: ca96d70
• Duration 0:47:21
• Result: ✅ SUCCEEDED
• Error: N/A
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[foundationdb-ci]

Result of foundationdb-pr-clang on Linux CentOS 7

• Commit ID: ca96d70
• Duration 0:47:33
• Result: ✅ SUCCEEDED
• Error: N/A
• Build Logs (available for 30 days)
• Build Artifact (available for 30 days)

[foundationdb-ci]

Result of foundationdb-pr-cluster-tests on Linux CentOS 7

• Commit ID: ca96d70
• Duration 1:15:26
• Result: ✅ SUCCEEDED
• Error: N/A
• Build Logs (available for 30 days)
• Build Artifact (available for 30 days)