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The constants kTenantApplierBatchSizeBytes, kTenantApplierBatchSizeOps, kMinOplogEntriesPerThread, kTenantApplierThreadCount in the TenantOplogApplier should be server parameters instead of constants. Except kTenantApplierThreadCount, all should be settable at run time and take effect between batches.

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xgen-internal-githook commented on Wed, 2 Dec 2020 01:14:16 +0000: Author: {'name': 'Vishnu Kaushik', 'email': 'vishnu.kaushik@mongodb.com', 'username': 'kauboy26'} Message: SERVER-50024 make tunable server parameters for TenantOplogProcessing constants Branch: master https://github.com/mongodb/mongo/commit/597c867f9adb8a74eaa18d3427a889c01f76aa22 xuerui.fa commented on Fri, 20 Nov 2020 20:43:48 +0000: matthew.russotto a few quick questions: 1. Should we retain the current values of each of these constants as the default? 2. For all the server params except kTenantApplierThreadCount, should we allow users to set at both startup and run time? CC pavithra.vetriselvan

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