用數據泵impdp往開發數據庫導數據，但導入到INDEX時感覺卡住不動了
Processing object type SCHEMA_EXPORT/TABLE/INDEX/INDEX ----查看狀態，Completed Objects: 33一直沒有變化。 Import> status Job: SYS_IMPORT_FULL_01 Operation: IMPORT Mode: FULL State: EXECUTING Bytes Processed: 843,222,272 Percent Done: 99 Current Parallelism: 1 Job Error Count: 0 Dump File: /home/oracle/dump/wj_dev%u.dmp Dump File: /home/oracle/dump/wj_dev01.dmp Dump File: /home/oracle/dump/wj_dev02.dmp Dump File: /home/oracle/dump/wj_dev03.dmp Dump File: /home/oracle/dump/wj_dev04.dmp Dump File: /home/oracle/dump/wj_dev05.dmp Dump File: /home/oracle/dump/wj_dev06.dmp Dump File: /home/oracle/dump/wj_dev07.dmp Dump File: /home/oracle/dump/wj_dev08.dmp Dump File: /home/oracle/dump/wj_dev09.dmp Dump File: /home/oracle/dump/wj_dev10.dmp Worker 1 Status: Process Name: DW00 State: EXECUTING Object Schema: ESOP2TEST Object Name: SYS_MSISDNNUMID Object Type: SCHEMA_EXPORT/TABLE/INDEX/INDEX Completed Objects: 33 Worker Parallelism: 1
查看導入任務對應的會話做在等待什麼
SQL> select * from DBA_DATAPUMP_JOBS; OWNER_NAME JOB_NAME OPERATION JOB_MODE STATE DEGREE ATTACHED_SESSIONS DATAPUMP_SESSIONS ---------- ------------------------------ ------------------------------ ------------------------------ ------------------------------ ---------- ----------------- ----------------- SYS SYS_IMPORT_FULL_01 IMPORT FULL EXECUTING 1 2 4 SQL> select sid,sql_id,event from v$session where action='SYS_IMPORT_FULL_01'; SID SQL_ID EVENT ---------- ------------- ---------------------------------------------------------------- 146 bjf05cwcj5s6p wait for unread message on broadcast channel 295 58rzgvcv6gnjs statement suspended, wait error to be cleared
從上面的查詢中可以看到“statement suspended, wait error to be cleared”等待事件，這個是一個不常見的等待事件。
繼續查看alert日誌，發現如下報錯：
statement in resumable session 'SYS.SYS_IMPORT_FULL_01.1' was suspended due to ORA-01652: unable to extend temp segment by 128 in tablespace TEMP
看到上面的報錯就能明白爲什麼導入會卡住不動了，正在導入INDEX，創建索引會使用臨時表空間，但臨時文件太小又沒有設置自動擴展導致創建索引語句HANG住。啓用臨時文件的自動擴展問題解決：
alter database tempfile '/oradata/dbs/temp01.dbf' autoextend on next 100m;
導入正常：
Import> status Job: SYS_IMPORT_FULL_01 Operation: IMPORT Mode: FULL State: EXECUTING Bytes Processed: 843,222,272 Percent Done: 99 Current Parallelism: 1 Job Error Count: 0 Dump File: /home/oracle/dump/wj_dev%u.dmp Dump File: /home/oracle/dump/wj_dev01.dmp Dump File: /home/oracle/dump/wj_dev02.dmp Dump File: /home/oracle/dump/wj_dev03.dmp Dump File: /home/oracle/dump/wj_dev04.dmp Dump File: /home/oracle/dump/wj_dev05.dmp Dump File: /home/oracle/dump/wj_dev06.dmp Dump File: /home/oracle/dump/wj_dev07.dmp Dump File: /home/oracle/dump/wj_dev08.dmp Dump File: /home/oracle/dump/wj_dev09.dmp Dump File: /home/oracle/dump/wj_dev10.dmp Worker 1 Status: Process Name: DW00 State: EXECUTING Object Schema: SUF3TEST Object Name: IDX_ORDER_MEMBER_CHARACTER_ID Object Type: SCHEMA_EXPORT/TABLE/INDEX/INDEX Completed Objects: 407 Worker Parallelism: 1