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RR模式下insert..selcet sending data狀態(tài)是怎樣的，針對這個問題，這篇文章詳細介紹了相對應的分析和解答，希望可以幫助更多想解決這個問題的小伙伴找到更簡單易行的方法。
例如：
其中的sending data是什么意思。隔離級別為RR，語句為insert..select。
以前就說過這個問題，實際上sending data可能包含如下：
Innodb 層數(shù)據(jù)的定位返回給MySQL 層
Innodb 層數(shù)據(jù)的查詢返回給MySQL 層
Innodb 層數(shù)據(jù)的修改(如果是insert..select)
Innodb 層加鎖以及等待
等待進入Innodb層(innodb_thread_concurrency參數(shù))
MySQL 層發(fā)送數(shù)據(jù)給客戶端
RR模式下insert..select的select表會上S行鎖，如果這行處于X鎖則會出現(xiàn) sending data狀態(tài)
insert..selcet中insert記錄如果處于堵塞（唯一性檢查）狀態(tài)會處于 sending data狀態(tài)
整個過程如果需要操作的數(shù)據(jù)量較大，處于sending data狀態(tài)。
929 T@4: | | | | | | THD::enter_stage: 'Sending data' /cdh/mysqldebug/percona-server-5.7.29-32/sql/sql_executor.cc:202 930 T@4: | | | | | | >PROFILING::status_change 931 T@4: | | | | | | <PROFILING::status_change 391 932 T@4: | | | | | | info: Sending data 933 T@4: | | | | | | >do_select 934 T@4: | | | | | | | >sub_select 935 T@4: | | | | | | | | >init_read_record 936 T@4: | | | | | | | | | info: using rr_sequential 937 T@4: | | | | | | | | | >ha_rnd_init 938 T@4: | | | | | | | | | | >change_active_index 939 T@4: | | | | | | | | | | | >innobase_get_index 940 T@4: | | | | | | | | | | | <innobase_get_index 10117 941 T@4: | | | | | | | | | | <change_active_index 10241 942 T@4: | | | | | | | | | <ha_rnd_init 3111 943 T@4: | | | | | | | | | >innobase_trx_init 944 T@4: | | | | | | | | | <innobase_trx_init 3109 945 T@4: | | | | | | | | <init_read_record 349 946 T@4: | | | | | | | | >handler::ha_rnd_next 947 T@4: | | | | | | | | | >rnd_next 948 T@4: | | | | | | | | | | >index_first 949 T@4: | | | | | | | | | | | >index_read 950 T@4: | | | | | | | | | | | | >row_search_mvcc 951 T@4: | | | | | | | | | | | | | >row_sel_store_mysql_rec 952 T@4: | | | | | | | | | | | | | | >row_sel_store_mysql_field_func 953 T@4: | | | | | | | | | | | | | | <row_sel_store_mysql_field_func 3275 954 T@4: | | | | | | | | | | | | | | >row_sel_store_mysql_field_func 955 T@4: | | | | | | | | | | | | | | <row_sel_store_mysql_field_func 3275 956 T@4: | | | | | | | | | | | | | <row_sel_store_mysql_rec 3465 957 T@4: | | | | | | | | | | | | <row_search_mvcc 6574 958 T@4: | | | | | | | | | | | <index_read 10042 959 T@4: | | | | | | | | | | <index_first 10430 960 T@4: | | | | | | | | | <rnd_next 10531 961 T@4: | | | | | | | | <handler::ha_rnd_next 3172 962 T@4: | | | | | | | | >evaluate_join_record 963 T@4: | | | | | | | | | enter: join: 0x7ffef8019970 join_tab index: 0 table: testlock cond: 0x0 964 T@4: | | | | | | | | | counts: evaluate_join_record join->examined_rows++: 1 965 T@4: | | | | | | | | | >end_send 966 T@4: | | | | | | | | | | >Query_result_insert::send_data 967 T@4: | | | | | | | | | | | >fill_record 968 T@4: | | | | | | | | | | | | >Item_field::save_in_field_inner 969 T@4: | | | | | | | | | | | | <Item_field::save_in_field_inner 6720 970 T@4: | | | | | | | | | | | | >Item_field::save_in_field_inner 971 T@4: | | | | | | | | | | | | <Item_field::save_in_field_inner 6720 972 T@4: | | | | | | | | | | | <fill_record 9801 973 T@4: | | | | | | | | | | | >write_record 974 T@4: | | | | | | | | | | | | >init_alloc_root 975 T@4: | | | | | | | | | | | | | enter: root: 0x7fffe8e48c20 976 T@4: | | | | | | | | | | | | <init_alloc_root 100 977 T@4: | | | | | | | | | | | | >COPY_INFO::set_function_defaults 978 T@4: | | | | | | | | | | | | <COPY_INFO::set_function_defaults 135 979 T@4: | | | | | | | | | | | | >handler::ha_write_row 980 T@4: | | | | | | | | | | | | | >ha_innobase::write_row 981 T@4: | | | | | | | | | | | | | | >row_ins 982 T@4: | | | | | | | | | | | | | | | row_ins: table: test/testbb 983 T@4: | | | | | | | | | | | | | | | >row_ins_index_entry_step 984 T@4: | | | | | | | | | | | | | | | | >row_ins_clust_index_entry 985 T@4: | | | | | | | | | | | | | | | | | >row_ins_clust_index_entry_low 986 T@4: | | | | | | | | | | | | | | | | | | >btr_cur_search_to_nth_level 987 T@4: | | | | | | | | | | | | | | | | | | <btr_cur_search_to_nth_level 2092 988 T@4: | | | | | | | | | | | | | | | | | | >thd_report_row_lock_wait 989 T@4: | | | | | | | | | | | | | | | | | | <thd_report_row_lock_wait 4280 990 T@4: | | | | | | | | | | | | | | | | | <row_ins_clust_index_entry_low 2692 991 T@4: | | | | | | | | | | | | | | | | <row_ins_clust_index_entry 3337 992 T@4: | | | | | | | | | | | | | | | <row_ins_index_entry_step 3619 993 T@4: | | | | | | | | | | | | | | <row_ins 3763 994 T@4: | | | | | | | | | | | | | | >thd_mark_transaction_to_rollback 995 T@4: | | | | | | | | | | | | | | <thd_mark_transaction_to_rollback 4147 996 T@4: | | | | | | | | | | | | | <ha_innobase::write_row 8895 997 T@4: | | | | | | | | | | | | <handler::ha_write_row 8565
及RR模式下insert select的邏輯大概為查詢一行加鎖（RC下沒有加鎖步驟）一行插入一行，直到所有行處理完成。整個過程處于’Sending data’狀態(tài)下面。因此insert select和普通的insert操作有較大的區(qū)別。
關于RR模式下insert..selcet sending data狀態(tài)是怎樣的問題的解答就分享到這里了，希望以上內(nèi)容可以對大家有一定的幫助，如果你還有很多疑惑沒有解開，可以關注億速云行業(yè)資訊頻道了解更多相關知識。
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