unable to solve "mvexpand: output will be truncated due to excessive memory usage."

[saikumar009]

Hello,
I am running into an issue with some spath and mvexpand functions in splunk. I get the following error: "output will be truncated at 3700 results due to excessive memory usage."

after searching here few previous answer worked. However it is not working out for me 

Here is my search 

index=ehub-loop
|rex "(?:((?:\[BEGIN LOGGING AT (?<Event_Timestamp>.*)\]\n)?)((?:(?P<Event_log_entry>(?s).*)\n)?)((?:\[END LOGGING])?))" offset_field=_extracted_fields_bounds
| rex field=Event_log_entry max_match=0 "^(?<single_log_entry>.+)\n*" offset_field=_extracted_fields_bounds
| mvexpand single_log_entry
| rex field=single_log_entry "(?P<log_Timestamp>\d{4}\-\d{2}\-\d{2}\s\d{2}:\d{2}:\d{2}\,\d{3})\s+(?P<log_level>[^ ]+)\s+\[(?P<Thread_Number>[^ ]+)\]\s+(?P<Class_Name>[^ ]+)\s+\-\s+(?P<log_msg>(?s).*)" offset_field=_extracted_fields_bounds
|stats count(Class_Name) as Error_Count by Class_Name,log_level,log_msg

Each event will be like

[BEGIN LOGGING AT 2021-05-20 21:00:12,505]
2021-05-21 12:09:40,460 Loglevel [Threadid] Classname - logmsg
2021-05-21 12:09:40,476 Loglevel [Threadid] Classname - logmsg
2021-05-21 12:09:40,507 Loglevel [Threadid] Classname - logmsg
2021-05-21 12:09:40,507 Loglevel [Threadid] Classname - logmsg
2021-05-21 12:09:40,522 Loglevel [Threadid] Classname - logmsg
[END LOGGING]

Please help me out

[kamlesh_vaghela]

@saikumar009 

Can you please try this?

index=ehub-loop
| rex "(?:((?:\[BEGIN LOGGING AT (?<Event_Timestamp>.*)\]\n)?)((?:(?P<Event_log_entry>(?s).*)\n)?)((?:\[END LOGGING])?))" offset_field=_extracted_fields_bounds
| rex field=Event_log_entry max_match=0 "^(?<single_log_entry>.+)\n*" offset_field=_extracted_fields_bounds
| stats count by single_log_entry 
| rex field=single_log_entry "(?P<log_Timestamp>\d{4}\-\d{2}\-\d{2}\s\d{2}:\d{2}:\d{2}\,\d{3})\s+(?P<log_level>[^ ]+)\s+\[(?P<Thread_Number>[^ ]+)\]\s+(?P<Class_Name>[^ ]+)\s+\-\s+(?P<log_msg>(?s).*)" offset_field=_extracted_fields_bounds
| stats sum(count) as Error_Count by Class_Name,log_level,log_msg

My Sample Search :

| makeresults | eval _raw="[BEGIN LOGGING AT 2021-05-20 21:00:12,505]
2021-05-21 12:09:40,460 Loglevel [Threadid] Classname - logmsg
2021-05-21 12:09:40,476 Loglevel [Threadid] Classname - logmsg
2021-05-21 12:09:40,507 Loglevel [Threadid] Classname - logmsg
2021-05-21 12:09:40,507 Loglevel [Threadid] Classname - logmsg
2021-05-21 12:09:40,522 Loglevel [Threadid] Classname - logmsg
[END LOGGING]
" | multikv 
| rex "(?:((?:\[BEGIN LOGGING AT (?<Event_Timestamp>.*)\]\n)?)((?:(?P<Event_log_entry>(?s).*)\n)?)((?:\[END LOGGING])?))" offset_field=_extracted_fields_bounds
| rex field=Event_log_entry max_match=0 "^(?<single_log_entry>.+)\n*" offset_field=_extracted_fields_bounds
| stats count by single_log_entry 
| rex field=single_log_entry "(?P<log_Timestamp>\d{4}\-\d{2}\-\d{2}\s\d{2}:\d{2}:\d{2}\,\d{3})\s+(?P<log_level>[^ ]+)\s+\[(?P<Thread_Number>[^ ]+)\]\s+(?P<Class_Name>[^ ]+)\s+\-\s+(?P<log_msg>(?s).*)" offset_field=_extracted_fields_bounds
| stats sum(count) as Error_Count by Class_Name,log_level,log_msg

Thanks
KV
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