[Impala-ASF-CR] IMPALA-6035: Add query options to limit thread reservation

["Tim Armstrong (Code Review)" <ge...@cloudera.org>]

Tim Armstrong has posted comments on this change. ( http://gerrit.cloudera.org:8080/10365 )

Change subject: IMPALA-6035: Add query options to limit thread reservation
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Patch Set 9:

(1 comment)

http://gerrit.cloudera.org:8080/#/c/10365/9/common/thrift/ImpalaInternalService.thrift
File common/thrift/ImpalaInternalService.thrift:

http://gerrit.cloudera.org:8080/#/c/10365/9/common/thrift/ImpalaInternalService.thrift@287
PS9, Line 287:   66: optional i32 thread_reservation_limit = 0;
Dan suggested setting a default here. I started doing some experiments to see what our current practical limits are.

On stock Ubuntu 16.04 I start getting thread_resource_error at around 8000 reserved threads. I'm not sure that the config reflects what people would use on production systems so continuing to investigate.



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I5b5bbbdad5cd6b24442eb6c99a4d38c2ad710007
Gerrit-Change-Number: 10365
Gerrit-PatchSet: 9
Gerrit-Owner: Tim Armstrong <ta...@cloudera.com>
Gerrit-Reviewer: Bikramjeet Vig <bi...@cloudera.com>
Gerrit-Reviewer: Dan Hecht <dh...@cloudera.com>
Gerrit-Reviewer: Mostafa Mokhtar <mm...@cloudera.com>
Gerrit-Reviewer: Tim Armstrong <ta...@cloudera.com>
Gerrit-Comment-Date: Fri, 01 Jun 2018 20:11:47 +0000
Gerrit-HasComments: Yes