Data comes from Sandy Bridge system running sysbench OLTP RO in 1 thread against 1 table.
Call graphs:
- 0.14% mysqld mysqld
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- wsrep_on
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+ 28.85% ha_innobase::general_fetch(unsigned char*, unsigned int, unsigned int)
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+ 26.34% handler::ha_index_next(unsigned char*)
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+ 19.48% handler::index_read_idx_map(unsigned char*, unsigned int, unsigned char const*, unsigned long, ha_rkey_function)
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+ 13.60% ha_innobase::index_read(unsigned char*, unsigned char const*, unsigned int, ha_rkey_function)
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+ 9.40% handler::ha_index_read_map(unsigned char*, unsigned char const*, unsigned long, ha_rkey_function)
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+ 2.15% innobase_commit(handlerton*, THD*, bool)
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wsrep_on() is the one defined in wsrep_mysqld.cc. Most time spent for function call convention. I guess all calls come from InnoDB. Either call WSREP() or cache wsrep_on() value.
Bug
Major
