Performance over DG from mysql to oracle very slow for inserts

Question

configured het services over gateway from oracle 11.2.0.4 to mysql 5.6
Have a table I want to pull over into oracle.  1000 rows.
On mysql : create view vw_mysql_t1 as select columns from my_mysql_table.    
On Oracle:  create view vw_ora as select columns from  vw_mysql_t1@mysql_link
On oracle: select * from vw_ora data returns data in 3-4 seconds. 
however, try an insert to get the data over
     insert into a_table_on_oracle
         (select * from vw_ora)
takes 11-12 minutes.     
create table as or insert into same performance.  Tried just inserting 1 row  and same performance 11-12 minutes.  any ideas?

Answer 1

cant seem to get the trace file to generate.  any ideas, I have the config as below, the gateway is working, I can select data no problem from table@dcv   , just performance is terrible
logfile not in $ORACLE_HOME/hs/log
or
/tmp
this is my tns
dcv =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = tcp)(HOST = <IP of server>)(PORT = 1521))
    (CONNECT_DATA =
      (SID = dcv)
    (HS = OK)
this is my init file
# HS init parameters
HS_FDS_CONNECT_INFO=dcv
HS_FDS_TRACE_LEVEL=255
HS_FDS_SHAREABLE_NAME = /usr/lib64/libmyodbc5a.so
HS_RPC_FETCH_SIZE=50000               
HS_ROWID_CACHE_SIZE=10000
#HS_LONG_PIECE_TRANSFER_SIZE=1024
HS_LONG_PIECE_TRANSFER_SIZE=65536
HS_LANGUAGE=AMERICAN_AMERICA.WE8ISO8859P15    ## The Oracle RDBMS is using a Unicode characterset [ID 756186.1]
HS_FDS_FETCH_ROWS=1                           ## This is select int datatype
HS_FDS_SQLLEN_INTERPRETATION=32               ## This is to select NULL values via DB Link [ID 554409.1]
# ODBC specific environment variables
set ODBCINI=/etc/odbc.ini
more /etc/odbc.ini
[dcv]
Driver       = /usr/lib64/libmyodbc5a.so
SERVER       = <IP of mysql server>
PORT         = 3306
USER         = un
Password     = pw
Database     = dcv
OPTION       = 3
CHARSET      = latin1
[ODBC]
TRACE        = ON     # also tried 0 and 1 and DEBUG and USER
TraceFile    = /tmp/odbc.trace
10:11:19 SQL> select count(*) from "vw_t1"@dcv;
  COUNT(*)
     24794
Elapsed: 00:00:00.23
10:11:45 SQL>
10:11:57 SQL>
10:11:57 SQL>
10:11:57 SQL>
10:11:57 SQL>
10:11:58 SQL> create table backup_data.delete_me as
10:11:59   2  select   * from
10:11:59   3        "vw_t1"@dcv;
Table created.
Elapsed: 00:09:47.07
10:21:49 SQL>
Theres around 130 columns, varchars, numerics and floats.  Is there a conversion going on that would take that long?