SCOTT@orcl_12.1.0.2.0> create table test1(names varchar2(1000));

Table created.

SCOTT@orcl_12.1.0.2.0> create index idx_names on test1(names) indextype is ctxsys.context;

Index created.

SCOTT@orcl_12.1.0.2.0> insert into test1 values('test record');

1 row created.

SCOTT@orcl_12.1.0.2.0> commit;

Commit complete.

SCOTT@orcl_12.1.0.2.0> begin
  2    CTX_OUTPUT.START_LOG('SYNCINDEX.LOG');
  3    ctx_ddl.sync_index('idx_names');
  4    CTX_OUTPUT.END_LOG;
  5  end;
  6  /

PL/SQL procedure successfully completed.

SCOTT@orcl_12.1.0.2.0> HOST TYPE C:\app\baboehme\product\12.1.0\dbhome_2\ctx\log\SYNCINDEX.LOG
Oracle Text, 12.1.0.2.0
18-31-18 11/10/17 begin logging
18-31-18 11/10/17 Beginning sync_index of index IDX_NAMES
18-31-18 11/10/17 Obtaining sync lock
18-31-18 11/10/17 Obtained sync lock
18-31-18 11/10/17 process dr$waiting table: SCOTT.IDX_NAMES
18-31-18 11/10/17 sync index: SCOTT.IDX_NAMES
18-31-18 11/10/17 Begin document indexing
18-31-18 11/10/17 Begin writing index to database.
18-31-18 11/10/17 Errors reading documents: 0
18-31-18 11/10/17 Index data for 1 documents to be written to database
18-31-18 11/10/17    memory use: 405260
18-31-18 11/10/17 Start writing index to $I.
18-31-18 11/10/17 Begin sorting the inverted list.
18-31-19 11/10/17 End sorting the inverted list.
18-31-19 11/10/17 Writing index data ($I) to database.
18-31-19 11/10/17 Flush size less than 16MB, Conventional Inserts
18-31-19 11/10/17 Wrote 2 rows (0 big rows) to $I.
18-31-19 11/10/17 Finish writing index to $I.
18-31-19 11/10/17 Writing index data ($K) to database.
18-31-19 11/10/17 Wrote 1 rows to $K.
18-31-19 11/10/17 Writing index data ($R) to database.
18-31-19 11/10/17 Locking base table rows.
18-31-19 11/10/17    index data written to database.
18-31-19 11/10/17 possibly start in-memory indexing again
18-31-19 11/10/17 End of document indexing. 1 documents indexed.
18-31-19 11/10/17 process dr$waiting table: SCOTT.IDX_NAMES
18-31-19 11/10/17 Completed sync_index of index IDX_NAMES
18-31-19 11/10/17 log
18-31-19 11/10/17 logging halted