Database Link, nice but drops

Question

I have a database link to a remote site (staging server to live server).
All is well until I throw quite a lot of data (some data from a table full of BLOBs), at which point I get, for example...
SQL> insert into MyTable@Myremote select * from MyTable where ROWNUM < 100;
insert into MyTable@Myremote select * from Table where ROWNUM < 100
ERROR at line 1:
ORA-12571: TNS:packet writer failure
ORA-12571: TNS:packet writer failure
Does this indicate a problem with our network in someway (it is happy with transfering small tables of rows etc)? Is there any way I can cause it to 'resume' as FTP would on a transfer, or is there a timeout property I need to set somewhere or something?
Staging server (data being transfered FROM) is 8.1.7 on Win2K (to patch level 8.1.7.0.2), Live server (data being transfered TO) is 8.1.6 on Win2K (to patch level 8.1.6.1.2)
Any help appreciated,
Thanks,
Jason.

Answer 1

Well I would start by checking the O/S event logs to see if it tells you if there is anything up with your protocol, hw, etc ?
I would also turn on the Oracle trace to see what it says ?
You cannot resume your operation in fact Oracle will rollback your insert as soon as it detects an abnormal end to the SQL exec thread which will occur when you lose the TNS connect.
Gut reaction sounds like you are timing out on the network. Just a guess. Have you tried upping the SDU and TDU values in your connect string ?
Have a nice day.
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Jason Kane ([email protected]):
I have a database link to a remote site (staging server to live server).
All is well until I throw quite a lot of data (some data from a table full of BLOBs), at which point I get, for example...
SQL> insert into MyTable@Myremote select * from MyTable where ROWNUM < 100;
insert into MyTable@Myremote select * from Table where ROWNUM < 100
ERROR at line 1:
ORA-12571: TNS:packet writer failure
ORA-12571: TNS:packet writer failure
Does this indicate a problem with our network in someway (it is happy with transfering small tables of rows etc)? Is there any way I can cause it to 'resume' as FTP would on a transfer, or is there a timeout property I need to set somewhere or something?
Staging server (data being transfered FROM) is 8.1.7 on Win2K (to patch level 8.1.7.0.2), Live server (data being transfered TO) is 8.1.6 on Win2K (to patch level 8.1.6.1.2)
Any help appreciated,
Thanks,
Jason.<HR></BLOCKQUOTE>
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