OceanBase中4.x怎么查询锁

2024年 6月 27日 73.4k 0

背景:

作为dba在日常工作中肯定经常遇到两个场景

  1. 业务找过来说表上有锁,阻塞业务了,帮杀下,或者看下
  2. 业务反馈有个程序平时几秒就完了,结果出现跑了好几分钟的情况

其实第二种场景排除执行计划突变和数据量突变的情况,大部分也是锁导致的。
那么这两个问题都是怎么排查锁,只不过是当前的锁,和历史的锁。
那么我用一个实验来展示这两个场景怎么分析。
先介绍下我使用的环境版本为

observer (OceanBase 4.3.0.1)
REVISION: 101000062024032200-b59432e535c48e8b8828190c803b6c7736413ff9
BUILD_BRANCH: HEAD
BUILD_TIME: Mar 22 2024 00:52:21
BUILD_FLAGS: RelWithDebInfo
BUILD_INFO:

实验场景:

1.第一个场景:当前正在锁的表

我们先开启一个事务,然后更新一行数据,但是不提交。

OceanBase中4.x怎么查询锁-1

然后我们模仿程序,通过java代码去调用sql,更新同一条数据。

OceanBase中4.x怎么查询锁-2

我们可以看到程序现在是卡死的状态。这时候我们就可以去库里去查下了。

MySQL [oceanbase]> select * from  __all_virtual_processlist where TENANT='htap' and user_client_ip<>'127.0.0.1';
+------------+------+--------+--------------------+------+---------+--------+------+-------+------+--------------+----------+----------+---------------------+---------------+----------------+-----------+----------+-----------+------------+----------+-------------+------------+-----------+------------+--------+--------+-------------+-----------+---------+-----------+---------------------+-------+-------------------+-----------------------+--------+--------+----------+----------+-----------+------------------+------------+--------------+
| id         | user | tenant | host               | db   | command | sql_id | time | state | info | svr_ip       | svr_port | sql_port | proxy_sessid        | master_sessid | user_client_ip | user_host | trans_id | thread_id | ssl_cipher | trace_id | trans_state | total_time | retry_cnt | retry_info | action | module | client_info | sql_trace | plan_id | tenant_id | effective_tenant_id | level | sample_percentage | record_policy         | lb_vid | lb_vip | lb_vport | in_bytes | out_bytes | user_client_port | proxy_user | service_name |
+------------+------+--------+--------------------+------+---------+--------+------+-------+------+--------------+----------+----------+---------------------+---------------+----------------+-----------+----------+-----------+------------+----------+-------------+------------+-----------+------------+--------+--------+-------------+-----------+---------+-----------+---------------------+-------+-------------------+-----------------------+--------+--------+----------+----------+-----------+------------------+------------+--------------+
| 3221643380 | SYS  | htap   | 134.90.8.212:39832 | SYS  | Sleep   |        |   24 | SLEEP | NULL | 134.90.8.212 |     2882 |     2881 | 9681060055801331737 |          NULL | 134.90.8.212   | %         |  3917058 |         0 | NULL       | NULL     | ACTIVE      |         24 |         0 |          0 |        |        |             |         1 |    3036 |      1002 |                1002 |     1 |                10 | SAMPLE_AND_SLOW_QUERY |   NULL | NULL   |     NULL |      663 |     13527 |            59424 | NULL       | NULL         |
| 3221704604 | SYS  | htap   | 134.90.8.212:43442 | SYS  | Sleep   |        |    5 | SLEEP | NULL | 134.90.8.212 |     2882 |     2881 | 9681060055801331738 |          NULL | 134.90.8.9     | %         |        0 |         0 | NULL       | NULL     |             |          5 |         6 |      -6005 |        |        |             |         1 |    3037 |      1002 |                1002 |     1 |                10 | SAMPLE_AND_SLOW_QUERY |   NULL | NULL   |     NULL |     1078 |     11179 |            42302 | NULL       | NULL         |
| 3222051655 | SYS  | htap   | 134.90.8.212:38844 | SYS  | Sleep   |        |  969 | SLEEP | NULL | 134.90.8.216 |     2882 |     2881 | 9681060055801331737 |          NULL | 134.90.8.212   | %         |        0 |         0 | NULL       | NULL     |             |        969 |         0 |          0 |        |        |             |         1 |     322 |      1002 |                1002 |     1 |                10 | SAMPLE_AND_SLOW_QUERY |   NULL | NULL   |     NULL |      638 |      8569 |            59424 | NULL       | NULL         |
+------------+------+--------+--------------------+------+---------+--------+------+-------+------+--------------+----------+----------+---------------------+---------------+----------------+-----------+----------+-----------+------------+----------+-------------+------------+-----------+------------+--------+--------+-------------+-----------+---------+-----------+---------------------+-------+-------------------+-----------------------+--------+--------+----------+----------+-----------+------------------+------------+--------------+
3 rows in set (0.02 sec)

其实通过__all_virtual_processlist我们就可以看到持有锁的会话,以及被锁的会话,可以看到第二个session的retry_info有6005获取锁失败的报错,那他就是被阻塞的会话,第一个active的就是持有锁,阻塞别人的会话,只要第一个会话回滚或者提交,释放掉锁,第二个会话就可以获取到锁,因为我这是测试环境会话比较少比较好看,那么实际生产可能不那么好看,那么就再介绍下别的方式。

OceanBase中4.x怎么查询锁-3

小场景(1)业务反馈有积压,程序跑不动卡住了,但是不确定是卡在哪些表上了

那么可以通过以下的sql查询持有锁的所有会话,以及表名。我们可以拿着这些表找业务确认他们的程序涉及哪几个表,对应的处理下就可以了。(ps:如果涉及杀会话的话,要确认好持有锁的会话杀掉会不会影响业务),下面sql可以理解为查询持有锁的会话和表。

MySQL [oceanbase]> select a.tenant_id,a.svr_ip,a.ls_id,a.table_id,c.table_id table_actual_id,c.table_name,a.tablet_id,a.session_id,a.ctx_create_time  
    ->      from __all_virtual_trans_lock_stat a 
    ->      left join __all_virtual_tablet_to_ls b on b.tablet_id=a.tablet_id
    ->      left join __all_virtual_table c on b.table_id=c.table_id;
+-----------+--------------+-------+----------+-----------------+------------+-----------+------------+----------------------------+
| tenant_id | svr_ip       | ls_id | table_id | table_actual_id | table_name | tablet_id | session_id | ctx_create_time            |
+-----------+--------------+-------+----------+-----------------+------------+-----------+------------+----------------------------+
|      1002 | 169.78.3.112 |  1001 |        0 |          500008 | ZRY2       |    200010 | 3221643380 | 2024-04-12 10:32:52.880125 |
+-----------+--------------+-------+----------+-----------------+------------+-----------+------------+----------------------------+
1 row in set (0.09 sec)

小场景(2)业务反馈涉及某个表的程序卡住了

那么我们就针对这个表查下有没有锁就可以了,查询语句如下。该sql是根据表名查询持有锁的会话。

MySQL [oceanbase]> select * from  (select a.tenant_id,a.svr_ip,a.ls_id,a.table_id,c.table_id table_actual_id,c.table_name,a.tablet_id,a.session_id,a.ctx_create_time  
    ->      from __all_virtual_trans_lock_stat a 
    ->      left join __all_virtual_tablet_to_ls b on b.tablet_id=a.tablet_id
    ->      left join __all_virtual_table c on b.table_id=c.table_id) t where t.table_name like '%ZRY2%';
+-----------+--------------+-------+----------+-----------------+------------+-----------+------------+----------------------------+
| tenant_id | svr_ip       | ls_id | table_id | table_actual_id | table_name | tablet_id | session_id | ctx_create_time            |
+-----------+--------------+-------+----------+-----------------+------------+-----------+------------+----------------------------+
|      1002 | 169.78.3.112 |  1001 |        0 |          500008 | ZRY2       |    200010 | 3221643380 | 2024-04-12 10:32:52.880125 |
+-----------+--------------+-------+----------+-----------------+------------+-----------+------------+----------------------------+
1 row in set (0.05 sec)

小场景(3)有时候可能多个程序逻辑会相互冲突,某个业务发现自己的程序被卡住了,但是他的业务逻辑可以手动调整,那他可能想先终止该会话先去走其他流程。

那么如下sql可以查询到被锁,或者说等待持有锁的会话。

MySQL [oceanbase]> select a.tenant_id,a.svr_ip,c.table_id table_actual_id,c.table_name,a.tablet_id,a.session_id,a.block_session_id,a.trans_id,a.holder_trans_id,a.lock_mode,a.`type`
    ->     from  __all_virtual_lock_wait_stat a 
    ->     left join __all_virtual_tablet_to_ls b on b.tablet_id=a.tablet_id
    ->     left join __all_virtual_table c on b.table_id=c.table_id;
+-----------+--------------+-----------------+------------+-----------+------------+------------------+----------+-----------------+-----------+------+
| tenant_id | svr_ip       | table_actual_id | table_name | tablet_id | session_id | block_session_id | trans_id | holder_trans_id | lock_mode | type |
+-----------+--------------+-----------------+------------+-----------+------------+------------------+----------+-----------------+-----------+------+
|      1002 | 169.78.3.112 |          500008 | ZRY2       |    200010 | 3221704604 |       3221704604 |  3917301 |         3917058 | X         |    1 |
+-----------+--------------+-----------------+------------+-----------+------------+------------------+----------+-----------------+-----------+------+
1 row in set (0.02 sec)

2.第二个场景:历史被锁的信息

dba经常遇到该场景,就是业务反馈有个程序平时几秒就完了,结果出现跑了好几分钟的情况,然后让帮查查怎么回事,一般我们确认是锁冲突导致的,那么会建议他们修改业务逻辑,但是有时候业务也不清楚更另外的哪个业务冲突了,那么我们如果能找到当时锁住他的业务模型,那么就方便业务去定位修改了。
那么我们先把刚才实验的第一个update提交一下。
OceanBase中4.x怎么查询锁-4
可以看到java程序也就获取到锁,执行结束了,因为java程序是我直接从官网案例里拿过来改了下sql,getString报错不影响我的目的。
OceanBase中4.x怎么查询锁-5

可以确认下数据,java程序是修改成功了。

OceanBase中4.x怎么查询锁-6

首先在生产等环境sqlaudit是刷的比较快的,很多时候要分析的话,要保留相应的aqlaudit,那么可以等场景复现时关闭下audit,保留下信息。

MySQL [oceanbase]> alter system set enable_sql_audit='False';

Query OK, 0 rows affected (0.07 sec)

然后我们可以通过业务提供或者业务日志里的sql语句去查下sql_audit信息。

MySQL [oceanbase]> select * from  gv$ob_sql_audit where query_sql='update zry2 set b=\'javacs\' where a=985 and c=164;' \G
*************************** 1. row ***************************
                         SVR_IP: 169.78.3.112
                       SVR_PORT: 2882
                     REQUEST_ID: 12119440
                    SQL_EXEC_ID: 52294148
                       TRACE_ID: YB42865A08D4-0006157C0336EBEA-0-0
                            SID: 3221704604
                      CLIENT_IP: 169.78.3.112
                    CLIENT_PORT: 43442
                      TENANT_ID: 1002
                    TENANT_NAME: htap
            EFFECTIVE_TENANT_ID: 1002
                        USER_ID: 200003
                      USER_NAME: SYS
                     USER_GROUP: 0
                 USER_CLIENT_IP: 169.78.16.6
                          DB_ID: 201006
                        DB_NAME: SYS
                         SQL_ID: 3E393CA2244E2C49F354EA1DE7874597
                      QUERY_SQL: update zry2 set b='javacs' where a=985 and c=164;
                        PLAN_ID: 3037
                  AFFECTED_ROWS: 1
                    RETURN_ROWS: 0
                  PARTITION_CNT: 1
                       RET_CODE: 0
                          QC_ID: 0
                         DFO_ID: 0
                         SQC_ID: 0
                      WORKER_ID: 0
                          EVENT: 
                         P1TEXT: 
                             P1: 0
                         P2TEXT: 
                             P2: 0
                         P3TEXT: 
                             P3: 0
                          LEVEL: 0
                  WAIT_CLASS_ID: 100
                    WAIT_CLASS#: 0
                     WAIT_CLASS: OTHER
                          STATE: MAX_WAIT TIME ZERO
                WAIT_TIME_MICRO: 0
          TOTAL_WAIT_TIME_MICRO: 0
                    TOTAL_WAITS: 0
                      RPC_COUNT: 2
                      PLAN_TYPE: 1
                   IS_INNER_SQL: 0
                IS_EXECUTOR_RPC: 0
                    IS_HIT_PLAN: 1
                   REQUEST_TIME: 1712889179734177
                   ELAPSED_TIME: 94830642
                       NET_TIME: 0
                  NET_WAIT_TIME: 4
                     QUEUE_TIME: 2467
                    DECODE_TIME: 3
                  GET_PLAN_TIME: 1698
                   EXECUTE_TIME: 160381
          APPLICATION_WAIT_TIME: 0
          CONCURRENCY_WAIT_TIME: 0
              USER_IO_WAIT_TIME: 0
                  SCHEDULE_TIME: 0
                  ROW_CACHE_HIT: 0
         BLOOM_FILTER_CACHE_HIT: 0
                BLOCK_CACHE_HIT: 243
                     DISK_READS: 0
                      RETRY_CNT: 30
                     TABLE_SCAN: 1
              CONSISTENCY_LEVEL: 3
        MEMSTORE_READ_ROW_COUNT: 2
         SSSTORE_READ_ROW_COUNT: 3
            DATA_BLOCK_READ_CNT: 0
           DATA_BLOCK_CACHE_HIT: 212
           INDEX_BLOCK_READ_CNT: 0
          INDEX_BLOCK_CACHE_HIT: 31
            BLOCKSCAN_BLOCK_CNT: 422
              BLOCKSCAN_ROW_CNT: 999999
PUSHDOWN_STORAGE_FILTER_ROW_CNT: 0
            REQUEST_MEMORY_USED: 1614992
          EXPECTED_WORKER_COUNT: 0
              USED_WORKER_COUNT: 0
                     SCHED_INFO: NULL
             FUSE_ROW_CACHE_HIT: 0
              PS_CLIENT_STMT_ID: -1
               PS_INNER_STMT_ID: -1
                          TX_ID: 3917415
               SNAPSHOT_VERSION: 1712889274559945492
                   REQUEST_TYPE: 2
          IS_BATCHED_MULTI_STMT: 0
                  OB_TRACE_INFO: NULL
                      PLAN_HASH: 5849233527757913110
             LOCK_FOR_READ_TIME: 0
                   PARAMS_VALUE: 
                      RULE_NAME: 
                  PARTITION_HIT: 1
            TX_INTERNAL_ROUTING: 0
               TX_STATE_VERSION: 0
                   FLT_TRACE_ID: 
                    PL_TRACE_ID: NULL
                PLSQL_EXEC_TIME: 0
  TOTAL_MEMSTORE_READ_ROW_COUNT: 0
   TOTAL_SSSTORE_READ_ROW_COUNT: 0
1 row in set (0.82 sec)

可以看到 ELAPSED_TIME: 94830642,总响应时间到了90多秒,但是其实EXECUTE_TIME: 160381,执行时间才160ms,其他的时间消耗也比较低,RETRY_CNT: 30,重试了30次,那么基本就是锁冲突导致了,我们通过TRACE_ID: YB42865A08D4-0006157C0336EBEA-0-0 去SVR_IP: 169.78.3.112节点的日志里搜索下。

xxxxxxxxxroot:/home/admin/oceanbase/log # grep YB42865A08D4-0006157C0336EBEA-0-0 observer.log|more 
[2024-04-12 10:32:59.739289] WDIAG [STORAGE.TRANS] mvcc_write (ob_mvcc_row.cpp:1023) [9181][T1002_L0_G0][T1002][YB42865A08D4-0006157C0336EBEA-0-0] [lt=21][e
rrcode=-6005] mvcc write conflict(ret=-6005, ctx={ObIMvccCtx={alloc_type=0 ctx_descriptor=0 min_table_version=1712482298355992 max_table_version=17124822983
55992 trans_version={val:4611686018427387903, v:0} commit_version={val:0, v:0} lock_wait_start_ts=0 replay_compact_version={val:0, v:0}} end_code=0 tx_statu
s=0 is_readonly=false ref=1 trans_id={txid:3917083} ls_id=1001 row_callback[alloc:0, free:0, unsubmit:0] redo[fill:0,sync_succ:0, sync_fail:0] main_list_len
=1 pending_log_size=0 callback_list:{cnt=1 need_merge=0 stat:[tx_end=0, rollback_to=0, fast_commit=0, remove_memtable=0] detail:[(log_epoch,length,logged,sy
nced,appended,removed,unlog_removed,branch_removed)|0:(1,1,0,0,1,0,0,0)|]}}, node=this=0x7fe662a11a10 trans_version={val:4611686018427387903, v:0} scn={val:
4611686018427387903, v:0} tx_id={txid:3917083} prev=(nil) next=(nil) modify_count=4294967295 acc_checksum=0 version=1712887388091454 type=0 flag=0 snapshot_
barrier=0 snapshot_barrier_flag=0 mtd={dml_flag:2, buf_len:49} seq_no={branch:0, seq:3}, res={can_insert:false, need_insert:false, is_new_locked:false, is_m
vcc_undo:false, lock_state:{is_locked:true, trans_version:{val:0, v:0}, lock_trans_id:{txid:3917058}, lock_data_sequence:{branch:0, seq:15984}, lock_dml_fla
g:2, is_delayed_cleanout:false, mvcc_row:0x7fe662a040a8, trans_scn:{val:4611686018427387903, v:0}}, is_checked:false, tx_node:NULL}, *this={this=0x7fe662a04
0a8 latch_=unlocked flag=11 first_dml=UPDATE last_dml=UPDATE update_since_compact=2 list_head=0x7fe662a11978 latest_compact_node=(nil) max_trans_version={va
l:1712887883522203616, v:0} max_trans_id=3912943 max_elr_trans_version={val:1712887883522203616, v:0} max_elr_trans_id=3912943 latest_compact_ts=0 last_comp
act_cnt=0 total_trans_node_cnt=3 max_modify_scn={val:1712887883522203616, v:0} min_modify_scn={val:1712887883518676835, v:0}})
[2024-04-12 10:32:59.739372] INFO  [STORAGE.TRANS] on_wlock_retry (ob_memtable_context.cpp:300) [9181][T1002_L0_G0][T1002][YB42865A08D4-0006157C0336EBEA-0-0
] [lt=78] mvcc_write conflict(key={"BIGINT UNSIGNED":33}, tx_id={txid:3917083}, conflict_tx_id={txid:3917058}, this={ObIMvccCtx={alloc_type=0 ctx_descriptor
=0 min_table_version=1712482298355992 max_table_version=1712482298355992 trans_version={val:4611686018427387903, v:0} commit_version={val:0, v:0} lock_wait_
start_ts=0 replay_compact_version={val:0, v:0}} end_code=0 tx_status=0 is_readonly=false ref=1 trans_id={txid:3917083} ls_id=1001 row_callback[alloc:0, free
:0, unsubmit:0] redo[fill:0,sync_succ:0, sync_fail:0] main_list_len=1 pending_log_size=0 callback_list:{cnt=1 need_merge=0 stat:[tx_end=0, rollback_to=0, fa
st_commit=0, remove_memtable=0] detail:[(log_epoch,length,logged,synced,appended,removed,unlog_removed,branch_removed)|0:(1,1,0,0,1,0,0,0)|]}})
[2024-04-12 10:32:59.739404] WDIAG [STORAGE] update_row (ob_tablet.cpp:3796) [9181][T1002_L0_G0][T1002][YB42865A08D4-0006157C0336EBEA-0-0] [lt=24][errcode=-
6005] failed to set memtable, (ret=-6005)

其实日志里很明显看到6005获取锁失败的信息,以及持有锁的lock_trans_id:{txid:3917058},那么根据这个txid就可以找到当时锁住该业务的另个业务模型。ps:在3.2.4版本中可以从日志中获取到持有锁的trans_hash的值,通过该值也可以获取该事务的业务模型。

MySQL [oceanbase]> select * from  gv$ob_sql_audit where tx_id=3917058 \G
*************************** 1. row ***************************
                         SVR_IP: 169.78.3.112
                       SVR_PORT: 2882
                     REQUEST_ID: 12116788
                    SQL_EXEC_ID: 52281688
                       TRACE_ID: YB42865A08D4-0006157C0336EBE3-0-0
                            SID: 3221643380
                      CLIENT_IP: 169.78.3.112
                    CLIENT_PORT: 39832
                      TENANT_ID: 1002
                    TENANT_NAME: htap
            EFFECTIVE_TENANT_ID: 1002
                        USER_ID: 200003
                      USER_NAME: SYS
                     USER_GROUP: 0
                 USER_CLIENT_IP: 169.78.3.112
                          DB_ID: 201006
                        DB_NAME: SYS
                         SQL_ID: 8D589AFA4DFAEEED85FFF5AA78E5FF6A
                      QUERY_SQL: begin
                        PLAN_ID: 0
                  AFFECTED_ROWS: 0
                    RETURN_ROWS: 0
                  PARTITION_CNT: 0
                       RET_CODE: 0
                          QC_ID: 0
                         DFO_ID: 0
                         SQC_ID: 0
                      WORKER_ID: 0
                          EVENT: 
                         P1TEXT: 
                             P1: 0
                         P2TEXT: 
                             P2: 0
                         P3TEXT: 
                             P3: 0
                          LEVEL: 0
                  WAIT_CLASS_ID: 100
                    WAIT_CLASS#: 0
                     WAIT_CLASS: OTHER
                          STATE: MAX_WAIT TIME ZERO
                WAIT_TIME_MICRO: 0
          TOTAL_WAIT_TIME_MICRO: 0
                    TOTAL_WAITS: 0
                      RPC_COUNT: 0
                      PLAN_TYPE: 0
                   IS_INNER_SQL: 0
                IS_EXECUTOR_RPC: 0
                    IS_HIT_PLAN: 0
                   REQUEST_TIME: 1712889172875953
                   ELAPSED_TIME: 200
                       NET_TIME: 0
                  NET_WAIT_TIME: 8
                     QUEUE_TIME: 37
                    DECODE_TIME: 1
                  GET_PLAN_TIME: 66
                   EXECUTE_TIME: 53
          APPLICATION_WAIT_TIME: 0
          CONCURRENCY_WAIT_TIME: 0
              USER_IO_WAIT_TIME: 0
                  SCHEDULE_TIME: 0
                  ROW_CACHE_HIT: 0
         BLOOM_FILTER_CACHE_HIT: 0
                BLOCK_CACHE_HIT: 0
                     DISK_READS: 0
                      RETRY_CNT: 0
                     TABLE_SCAN: 0
              CONSISTENCY_LEVEL: -1
        MEMSTORE_READ_ROW_COUNT: 0
         SSSTORE_READ_ROW_COUNT: 0
            DATA_BLOCK_READ_CNT: 0
           DATA_BLOCK_CACHE_HIT: 0
           INDEX_BLOCK_READ_CNT: 0
          INDEX_BLOCK_CACHE_HIT: 0
            BLOCKSCAN_BLOCK_CNT: 0
              BLOCKSCAN_ROW_CNT: 0
PUSHDOWN_STORAGE_FILTER_ROW_CNT: 0
            REQUEST_MEMORY_USED: 65536
          EXPECTED_WORKER_COUNT: 0
              USED_WORKER_COUNT: 0
                     SCHED_INFO: NULL
             FUSE_ROW_CACHE_HIT: 0
              PS_CLIENT_STMT_ID: -1
               PS_INNER_STMT_ID: -1
                          TX_ID: 3917058
               SNAPSHOT_VERSION: 0
                   REQUEST_TYPE: 2
          IS_BATCHED_MULTI_STMT: 0
                  OB_TRACE_INFO: NULL
                      PLAN_HASH: 0
             LOCK_FOR_READ_TIME: 0
                   PARAMS_VALUE: 
                      RULE_NAME: 
                  PARTITION_HIT: 1
            TX_INTERNAL_ROUTING: 1
               TX_STATE_VERSION: 1
                   FLT_TRACE_ID: 000615dd-16b0-59f2-f7a7-1215e6062770
                    PL_TRACE_ID: NULL
                PLSQL_EXEC_TIME: 0
  TOTAL_MEMSTORE_READ_ROW_COUNT: 0
   TOTAL_SSSTORE_READ_ROW_COUNT: 0
*************************** 2. row ***************************
                         SVR_IP: 169.78.3.112
                       SVR_PORT: 2882
                     REQUEST_ID: 12116789
                    SQL_EXEC_ID: 52281689
                       TRACE_ID: YB42865A08D4-0006157C0336EBE4-0-0
                            SID: 3221643380
                      CLIENT_IP: 169.78.3.112
                    CLIENT_PORT: 39832
                      TENANT_ID: 1002
                    TENANT_NAME: htap
            EFFECTIVE_TENANT_ID: 1002
                        USER_ID: 200003
                      USER_NAME: SYS
                     USER_GROUP: 0
                 USER_CLIENT_IP: 169.78.3.112
                          DB_ID: 201006
                        DB_NAME: SYS
                         SQL_ID: 328A68949A9F6E066CEA786B79D83BE9
                      QUERY_SQL: update  zry2 set b='cs' where a=985 and c=164
                        PLAN_ID: 3036
                  AFFECTED_ROWS: 1
                    RETURN_ROWS: 0
                  PARTITION_CNT: 1
                       RET_CODE: 0
                          QC_ID: 0
                         DFO_ID: 0
                         SQC_ID: 0
                      WORKER_ID: 0
                          EVENT: 
                         P1TEXT: 
                             P1: 0
                         P2TEXT: 
                             P2: 0
                         P3TEXT: 
                             P3: 0
                          LEVEL: 0
                  WAIT_CLASS_ID: 100
                    WAIT_CLASS#: 0
                     WAIT_CLASS: OTHER
                          STATE: MAX_WAIT TIME ZERO
                WAIT_TIME_MICRO: 0
          TOTAL_WAIT_TIME_MICRO: 0
                    TOTAL_WAITS: 0
                      RPC_COUNT: 0
                      PLAN_TYPE: 1
                   IS_INNER_SQL: 0
                IS_EXECUTOR_RPC: 0
                    IS_HIT_PLAN: 1
                   REQUEST_TIME: 1712889172876387
                   ELAPSED_TIME: 4429
                       NET_TIME: 0
                  NET_WAIT_TIME: 3
                     QUEUE_TIME: 145
                    DECODE_TIME: 0
                  GET_PLAN_TIME: 71
                   EXECUTE_TIME: 4196
          APPLICATION_WAIT_TIME: 0
          CONCURRENCY_WAIT_TIME: 0
              USER_IO_WAIT_TIME: 0
                  SCHEDULE_TIME: 0
                  ROW_CACHE_HIT: 0
         BLOOM_FILTER_CACHE_HIT: 0
                BLOCK_CACHE_HIT: 243
                     DISK_READS: 0
                      RETRY_CNT: 0
                     TABLE_SCAN: 1
              CONSISTENCY_LEVEL: 3
        MEMSTORE_READ_ROW_COUNT: 2
         SSSTORE_READ_ROW_COUNT: 3
            DATA_BLOCK_READ_CNT: 0
           DATA_BLOCK_CACHE_HIT: 212
           INDEX_BLOCK_READ_CNT: 0
          INDEX_BLOCK_CACHE_HIT: 31
            BLOCKSCAN_BLOCK_CNT: 422
              BLOCKSCAN_ROW_CNT: 999999
PUSHDOWN_STORAGE_FILTER_ROW_CNT: 0
            REQUEST_MEMORY_USED: 1369040
          EXPECTED_WORKER_COUNT: 0
              USED_WORKER_COUNT: 0
                     SCHED_INFO: NULL
             FUSE_ROW_CACHE_HIT: 0
              PS_CLIENT_STMT_ID: -1
               PS_INNER_STMT_ID: -1
                          TX_ID: 3917058
               SNAPSHOT_VERSION: 1712889172484169270
                   REQUEST_TYPE: 2
          IS_BATCHED_MULTI_STMT: 0
                  OB_TRACE_INFO: NULL
                      PLAN_HASH: 5849233527757913110
             LOCK_FOR_READ_TIME: 0
                   PARAMS_VALUE: 
                      RULE_NAME: 
                  PARTITION_HIT: 1
            TX_INTERNAL_ROUTING: 1
               TX_STATE_VERSION: 2
                   FLT_TRACE_ID: 000615dd-16b0-59f2-f7a7-1215e6062770
                    PL_TRACE_ID: NULL
                PLSQL_EXEC_TIME: 0
  TOTAL_MEMSTORE_READ_ROW_COUNT: 0
   TOTAL_SSSTORE_READ_ROW_COUNT: 0
*************************** 3. row ***************************
                         SVR_IP: 169.78.3.112
                       SVR_PORT: 2882
                     REQUEST_ID: 12119439
                    SQL_EXEC_ID: 52294147
                       TRACE_ID: YB42865A08D4-0006157C0336EBEB-0-0
                            SID: 3221643380
                      CLIENT_IP: 169.78.3.112
                    CLIENT_PORT: 39832
                      TENANT_ID: 1002
                    TENANT_NAME: htap
            EFFECTIVE_TENANT_ID: 1002
                        USER_ID: 200003
                      USER_NAME: SYS
                     USER_GROUP: 0
                 USER_CLIENT_IP: 169.78.3.112
                          DB_ID: 201006
                        DB_NAME: SYS
                         SQL_ID: FFFCA4D67EA0A788813031B8BBC3B329
                      QUERY_SQL: commit
                        PLAN_ID: 0
                  AFFECTED_ROWS: 0
                    RETURN_ROWS: 0
                  PARTITION_CNT: 0
                       RET_CODE: 0
                          QC_ID: 0
                         DFO_ID: 0
                         SQC_ID: 0
                      WORKER_ID: 0
                          EVENT: 
                         P1TEXT: 
                             P1: 0
                         P2TEXT: 
                             P2: 0
                         P3TEXT: 
                             P3: 0
                          LEVEL: 0
                  WAIT_CLASS_ID: 100
                    WAIT_CLASS#: 0
                     WAIT_CLASS: OTHER
                          STATE: MAX_WAIT TIME ZERO
                WAIT_TIME_MICRO: 0
          TOTAL_WAIT_TIME_MICRO: 0
                    TOTAL_WAITS: 0
                      RPC_COUNT: 4
                      PLAN_TYPE: 0
                   IS_INNER_SQL: 0
                IS_EXECUTOR_RPC: 0
                    IS_HIT_PLAN: 0
                   REQUEST_TIME: 1712889274559727
                   ELAPSED_TIME: 546
                       NET_TIME: 0
                  NET_WAIT_TIME: 5
                     QUEUE_TIME: 75
                    DECODE_TIME: 1
                  GET_PLAN_TIME: 94
                   EXECUTE_TIME: 344
          APPLICATION_WAIT_TIME: 0
          CONCURRENCY_WAIT_TIME: 0
              USER_IO_WAIT_TIME: 0
                  SCHEDULE_TIME: 0
                  ROW_CACHE_HIT: 0
         BLOOM_FILTER_CACHE_HIT: 0
                BLOCK_CACHE_HIT: 0
                     DISK_READS: 0
                      RETRY_CNT: 0
                     TABLE_SCAN: 0
              CONSISTENCY_LEVEL: -1
        MEMSTORE_READ_ROW_COUNT: 0
         SSSTORE_READ_ROW_COUNT: 0
            DATA_BLOCK_READ_CNT: 0
           DATA_BLOCK_CACHE_HIT: 0
           INDEX_BLOCK_READ_CNT: 0
          INDEX_BLOCK_CACHE_HIT: 0
            BLOCKSCAN_BLOCK_CNT: 0
              BLOCKSCAN_ROW_CNT: 0
PUSHDOWN_STORAGE_FILTER_ROW_CNT: 0
            REQUEST_MEMORY_USED: 65536
          EXPECTED_WORKER_COUNT: 0
              USED_WORKER_COUNT: 0
                     SCHED_INFO: NULL
             FUSE_ROW_CACHE_HIT: 0
              PS_CLIENT_STMT_ID: -1
               PS_INNER_STMT_ID: -1
                          TX_ID: 3917058
               SNAPSHOT_VERSION: 0
                   REQUEST_TYPE: 2
          IS_BATCHED_MULTI_STMT: 0
                  OB_TRACE_INFO: NULL
                      PLAN_HASH: 0
             LOCK_FOR_READ_TIME: 0
                   PARAMS_VALUE: 
                      RULE_NAME: 
                  PARTITION_HIT: 1
            TX_INTERNAL_ROUTING: 0
               TX_STATE_VERSION: 2
                   FLT_TRACE_ID: 000615dd-16b0-59f2-f7a7-1215e6062770
                    PL_TRACE_ID: NULL
                PLSQL_EXEC_TIME: 0
  TOTAL_MEMSTORE_READ_ROW_COUNT: 0
   TOTAL_SSSTORE_READ_ROW_COUNT: 0
3 rows in set (0.58 sec)

当然我这个实验中的实验模型比较简单,就是开启事务执行update然后commit,生产中的业务模型可能会涉及成百上千条sql,那么可以根据表名和时间缩小查询的范围,提供给业务有力并关键的信息和证据就可以。

总结:

因为4.x采用了日志流,所以在想确认表上的锁的时候要多关联一张表了,但是思路都是一样的,并没有什么不同,古人云:授人与鱼不如授人与渔。希望可以帮助大家学习与理解。
行之所向,莫问远方。

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