Database Tuning (MOSC)

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DB_LINK Performance degraded !!

edited Jul 22, 2015 6:11AM in Database Tuning (MOSC) 21 commentsAnswered

Hallo Experts,

a running script runs on a database 11.2.0.4 located in Austria to bring data from another database 10.2.0.5 located in Ukraine using DB_LINK.

this script simply insert into .... select x,y,z from tab@DB_LINK.

it takes usually between 1 second till tow minutes to insert 0 to 4000 rows. max size about 5 ~ 10 MB.

since tow weeks, this program takes 3 hours to finish, and sometimes it returns ORA-01555 from the source database (UK).

I checked the events on the Target database which located in Austria, the performance is died because of :

could you please Help! how to solve this issue.

I've checked the Network with the collegues in Network Administration. there no problem with the Network.

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