Hello Mike Percy,

I'd like you to do a code review.  Please visit

    http://gerrit.cloudera.org:8080/4159

to review the following change.

Change subject: transaction_tracker: back-off when logging in-flight 
transactions
......................................................................

transaction_tracker: back-off when logging in-flight transactions

On a test cluster pushed into overload, I ended up with thousands of
in-flight transactions which were only being drained at the rate of one
or two per second. Dumping the entire list of transactions once a second
ended up flooding the glog with many MB per second work of transaction
strings.

This changes the dumping to back-off exponentially.

Change-Id: I7d1a2563dd57c59ae8c130a5b26966f4964048de
---
M src/kudu/tablet/transactions/transaction_tracker.cc
1 file changed, 16 insertions(+), 13 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/59/4159/1
-- 
To view, visit http://gerrit.cloudera.org:8080/4159
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Gerrit-MessageType: newchange
Gerrit-Change-Id: I7d1a2563dd57c59ae8c130a5b26966f4964048de
Gerrit-PatchSet: 1
Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-Owner: Todd Lipcon <t...@apache.org>
Gerrit-Reviewer: Mike Percy <mpe...@apache.org>

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