Performance issue with below design

[Anonymous]

Gurus,
I'm new to talend. Got struck with the performance issue. Kindly help me, to fix it.
I have records in million. No chance to extract the data from db, all were from file.

>>Removing duplicates and retaining the record based on max date(used tsort and tuniq component)
>>Used different filter conditions on tmap and tfilterrow.

Job failed due to "main" java.lang.OutOfMemoryError: GC overhead limit exceeded
>>Increased the VM Argument to -Xmx4096M
But still, I got the same error.
>>Written to temp file in tmap and sorted on disk in tsort,
Got the same error.

My questions:
-->Sort is the main culprit. Any other possible ways to sort the data(don't have staging db to sort)?
-->I'm reading the same reference file twice,why because I cannot redirect the single tinputdelimited to two tmap reference. Is there is any way to read the file only once?
-->How the overall design can be improved?
Some guidance will be greatly helpful.
Thanks

[Anonymous]

Thanks.
Yes, initially I got the Outofmemory issue. I tried two scenarios.
Scenario 1:
>>Increased the Xmx to 16GB, it worked. Performance was very good(6 min). Is it good idea to use this much memory?
Scenario 2:
>>Reduced the Xmx to 8GB and used option store on disk in tmap_1 & tmap_2. But performance was not good. With this option tmap is sorting the data and storing into disk before join.
Didn't apply store on disk to tmap_3 & tmap_4. Do you think, that will be good idea?
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In tmap_3 & tmap_4, I removed the unwanted columns(9 to 3 columns) and filtered the records based on few condition.
Thanks

[Anonymous]

You could split this into multiple jobs to do the filtering and deduplicating. Then pass the cleaned data into the job above without tMap_3 & 4 and remove sort , tUnique, and tFilterRow.