Sync from bootstrap generates large platform/000003.log and performance is very poor
Summary
Syncing from bootstrap generates about 53MB of log file. If the wallet/node is shutdown and restarted a *.ldb file is written and the log is cleared.
Possibly related to this, the sync from bootstrap performance is MUCH worse than it used to be. On my machine, as recently as a couple of months ago, it used to take an hour to fully sync. In testing the newest bootstrap (5 April 2020) the sync took about 7 hours.
Steps to reproduce
(Wipe out contents of blocks, chainstate and platform folders) Sync from bootstrap
Expected behavior
Recently this took about an hour.
Problematic behavior
Testing yesterday, sync from bootstrap took 7 hours.
Crown-core environment info
MX-Linux 18.3
Crown-core application info
Crown version v0.14.0.1-Emerald (2020-04-02 15:31:34 +0000)
Relevant logs, dumps and/or screenshots
mark@x230:~/.crown/platform$ ls -l
total 52404
-rw------- 1 mark mark 53641824 Apr 6 18:30 000003.log
-rw------- 1 mark mark 16 Apr 5 20:38 CURRENT
-rw------- 1 mark mark 0 Apr 5 20:38 LOCK
-rw------- 1 mark mark 57 Apr 5 20:38 LOG
-rw------- 1 mark mark 50 Apr 5 20:38 MANIFEST-000002
mark@x230:~/.crown/platform$ cd ..
mark@x230:~/.crown$ zip -r issue367 platform
adding: platform/ (stored 0%)
adding: platform/LOG (stored 0%)
adding: platform/000003.log (deflated 100%)
adding: platform/LOCK (stored 0%)
adding: platform/MANIFEST-000002 (stored 0%)
adding: platform/CURRENT (deflated 6%)
mark@x230:~/.crown$ crown-cli restart
Crown server restarting
mark@x230:~/.crown$ Crown server starting
mark@x230:~/.crown$
mark@x230:~/.crown$ ll platform
total 32
-rw------- 1 mark 0 Apr 5 20:38 LOCK
-rw------- 1 mark 57 Apr 5 20:38 LOG.old
-rw------- 1 mark 10872 Apr 6 18:44 000005.ldb
-rw------- 1 mark 83 Apr 6 18:44 MANIFEST-000004
-rw------- 1 mark 16 Apr 6 18:44 CURRENT
-rw------- 1 mark 311 Apr 6 18:44 LOG
-rw------- 1 mark 19 Apr 6 18:44 000006.log
mark@x230:~/.crown$ grep "Crown version" debug.log
2020-04-06 16:44:18 Crown version v0.14.0.1-Emerald (2020-04-02 15:31:34 +0000)Uploaded issue367.zip to https://nextcloud.crownplatform.com/index.php/s/Q6H8enXNmJsQYCD
Possible fixes
(Any comments on what you think might be responsible for the problem, if you have particular insight.)
/cc @artem