Daniel Dai created PIG-4523:
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Summary: Tez engine should use tez config rather than mr config
whenever possible
Key: PIG-4523
URL: https://issues.apache.org/jira/browse/PIG-4523
Project: Pig
Issue Type: Bug
Components: tez
Reporter: Daniel Dai
Assignee: Daniel Dai
Fix For: 0.15.0
Currently, Pig on tez use memory/heap setting from MR not tez, but respect
other tez settings. In the environment which MR and tez settings are not
aligned, this could be a problem. For a specific scenario, user increase both
tez both memory settings and io.sort.mb to tune tez performance, but MR
settings retains. Pig on Tez get increased io.sort.mb but same vertex memory,
end up with OOM exception.
I think tez engine shall respect Tez settings first, unless user really want to
use mr settings for backward compatibility. It can be:
1. a flag which turn on the mr settings for tez
2. If the mr memory settings are from Pig script not the config file
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