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Type:
Bug
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Resolution: Done
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Priority:
Major - P3
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None
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Affects Version/s: None
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Component/s: None
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None
Run the YCSB workloada workload on a MongoDB instance running WT
Track the MongoD instance with perf and see that much of the CPU is consumed in checkpoining and eviction
- 23.80% mongod mongod [.] __wt_tree_walk
- __wt_tree_walk
- 99.05% __evict_server
start_thread
+ 0.95% __wt_cache_op
- 23.55% mongod mongod [.] __rec_txn_read
- __rec_txn_read
- 99.53% __rec_row_leaf_insert
__wt_reconcile
- __wt_cache_op
- 99.29% __checkpoint_worker
__checkpoint_apply
__wt_txn_checkpoint
__session_checkpoint
__ckpt_server
start_thread
+ 0.71% __checkpoint_apply
+ 2.54% mongod mongod [.] __rec_cell_build_leaf_key
+ 1.82% mongod [kernel.kallsyms] [k] find_get_pages
+ 1.70% mongod [kernel.kallsyms] [k] __mem_cgroup_uncharge_common
+ 1.67% mongod [kernel.kallsyms] [k] free_pcppages_bulk
+ 1.55% mongod libc-2.19.so [.] __memmove_ssse3_back
+ 1.49% mongod [kernel.kallsyms] [k] mem_cgroup_update_page_stat
+ 1.45% mongod [kernel.kallsyms] [k] find_get_pages_tag
+ 1.37% mongod [kernel.kallsyms] [k] release_pages
+ 1.33% mongod mongod [.] __rec_row_leaf_insert
+ 1.23% mongod [kernel.kallsyms] [k] block_invalidatepage
+ 1.17% mongod [kernel.kallsyms] [k] ext4_bio_write_page