Ogg data extraction delay is large

database impdp Imported a batch of new data , Produced 3T file ,OGG The extraction process delay is 40 Hours ,trace Display has been reading redo

General statistics:
0.00% Checking messages (includes checkpointing)
0.00% Checking periodic tasks
0.00% Waiting for more data
0.00% Converting ASCII data to internal
0.00% Reading input records
0.00% Writing output records (replicate_io)
0.00% Mapping columns
0.00% Outputting data records
0.00% Performing SQL statements
0.00% Executing BATCHSQL statements
0.00% Executing SQL statements
0.00% Preparing SQL statements
0.00% Commit operations
0.00% Rollback operations
0.00% Checkpointing

Redo log statistics:
0.06% Opening redo log file
0.00% Positioning into redo log file
95.94% Reading record from redo log file
0.69% Extracting subrecord from redo record
0.00% Retrieving and processing transaction items 

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Other answers 1：

Upload attachments ： trace.zip

Other answers 2：

Upgrade the problem to : An emergency

Other answers 3：

Other answers 4：

The archive is full

Other answers 5：

1、 Check the filing space , Is the archive full .

2、select * from v$log;

      select * from v$Logfile;

See if it's true redo logfile Not big enough ,current perhaps active More .

3、 Check the blocking chain , See if there is any abnormal waiting event .

Other answers 6：

From the log you sent, you have been reading the redo log , I don't know how you operated at that time ？ One impdp Will produce 3T file ,/ Surprise ; And then you impdp The watch that goes in is also ogg In the extracted queue ？

Other answers 7：

whatever CDC Tools for , Include OGG For big business , Especially you 3T All of them are not handled well , It can't even be dealt with .

Other answers 8：

view params extract    Take a screenshot to see the process parameter configuration

Other answers 9：

Other answers 10：

You are due to the classic mode OGG Extraction is to read all redo, then filter Filtering logs . Import a large amount of data , In a short time, a large number of redo Lead to OGG Process delay . normal , If you want to solve this ：
1. Merge OGG process , Reduce the extraction process , Reduce IO;
2. Change mode to integrated mode extraction process ;
3. Reduce the... Generated by data pump import redo, But this is a false proposition
transform=disable_archive_logging:y” function DataPump Archive logs will still be generated when importing jobs
12c Data pump import can reduce redo The birth of , however OGG The server db It's usually a suggestion force logging Then this parameter is also invalid ！