https://community.cloudera.com/t5/Support-Questions/Nifi-admin-rest-api-becomes-slow-day-by-day-if-nifi-service/m-p/380042#M243986 <P><a href="https://community.cloudera.com/t5/user/viewprofilepage/user-id/37332">@hegdemahendra</a>&nbsp;<BR /><BR />You also need to be careful with some rest-api request as they may generate reports that are held in NiFi heap until a rest-api call is made to remove them.&nbsp; Doing similar actions directly from the UI handles the multiple calls needed automatically.&nbsp; So calls like these can slowly eat away at the NiFi heap impacting performance until a restart.&nbsp; Provenance queries would be an example of this.<BR /><BR /><STRONG>Unrelated note:&nbsp;</STRONG> NiFi Variable registry has been deprecated in favor of NiFi Parameters now.&nbsp; The Variable registry functionality has been officially removed starting with the latest NiFi 2.0.0-M1 release.</P><P>&nbsp;</P><P>If you found any of the suggestions/solutions provided helped you with your issue, please take a moment to login and click "<SPAN><EM><STRONG><FONT color="#FF0000">Accept as Solution</FONT></STRONG></EM>" on one or more of them that helped.</SPAN></P><P><SPAN>Thank you,<BR />Matt</SPAN></P> Fri, 01 Dec 2023 15:13:59 GMT MattWho 2023-12-01T15:13:59Z