# Logstash reading CLOB Data from oracle

**URL:** <https://discuss.elastic.co/t/logstash-reading-clob-data-from-oracle/238786>\
**Category:** Logstash\
**Created:** [June 26, 2020, 5:30am UTC](https://discuss.elastic.co/t/logstash-reading-clob-data-from-oracle/238786 "2020-06-26T05:30:45Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![kamalgunda](https://avatars.discourse-cdn.com/v4/letter/k/bcef8e/32.png) [@kamalgunda](https://discuss.elastic.co/u/kamalgunda)\
**Post date:** [June 26, 2020, 5:30am UTC](https://discuss.elastic.co/t/logstash-reading-clob-data-from-oracle/238786/1 "2020-06-26T05:30:46Z")

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Hi  
I want to read CLOB data type column with nested json in it from source oracle table and write to ES using the logstash. I have configured the configuration file with input 4 JDBC connections on same table based on partition column . The total number of records in table are around 15 million , I observe that the read & write is very slow , it was just processing 600 events/sec and also noticed that if the input oracle column data doesn't have CLOB datatype with non nested then the read and write is super fast . Hence, how to make logstash read clob datatype column from oracle faster and write faster to ES index.Any suggestions is highly Appreciated.

THANKS IN ADVANCE FOR YOU

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 24, 2020, 5:30am UTC](https://discuss.elastic.co/t/logstash-reading-clob-data-from-oracle/238786/2 "2020-07-24T05:30:57Z")

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