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Posted to issues-all@impala.apache.org by "Zoltán Borók-Nagy (Jira)" <ji...@apache.org> on 2022/02/25 13:44:00 UTC
[jira] [Created] (IMPALA-11154) Idle Kudu daemons consume too much CPU
Zoltán Borók-Nagy created IMPALA-11154:
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Summary: Idle Kudu daemons consume too much CPU
Key: IMPALA-11154
URL: https://issues.apache.org/jira/browse/IMPALA-11154
Project: IMPALA
Issue Type: Bug
Components: Infrastructure
Reporter: Zoltán Borók-Nagy
I noticed that if I issue {{top}} in a machine that runs the minicluster, Kudu is always amongst the highest CPU consumers:
{noformat}
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
29730 borokna+ 20 0 1438712 101340 29256 S 27.8 0.3 17:43.76 kudu-tserver
29682 borokna+ 20 0 1435780 100764 29360 S 16.7 0.3 16:24.49 kudu-tserver
29700 borokna+ 20 0 1442964 104636 29452 S 16.7 0.3 18:18.77 kudu-tserver
{noformat}
The above is for a Kudu cluster that virtually doesn't do any work.
The flagfile looks like the following:
{noformat}
-rpc_bind_addresses=localhost:31202
-webserver_port=31302
-fs_wal_dir=/home/boroknagyz/Impala/testdata/cluster/cdh7/node-1/var/lib/kudu/ts/wal
-fs_data_dirs=/home/boroknagyz/Impala/testdata/cluster/cdh7/node-1/var/lib/kudu/ts/data
-log_dir=/home/boroknagyz/Impala/testdata/cluster/cdh7/node-1/var/log/kudu/ts
# The flags below require unsafe flags to be unlocked.
-unlock_unsafe_flags
# fsync is disabled for additional speed. Sometimes operations are slow on EC2/GCE test
# machines. Some data loss could occur if the system crashes before the OS has a chance
# to flush data to disk but that is acceptable for development purposes.
-never_fsync
# There is no need to require NTP-synchronized clock for tests where all the
# participating Kudu masters and tablet servers are run at the same node using the same
# local wallclock.
-time_source=system_unsync
# Enable Kudu transaction.
-enable_txn_system_client_init
-unlock_experimental_flags
{noformat}
Kudu version info is
{noformat}
kudu 67ba3cae45
revision 67ba3cae45143d083bdac119f45278ce0d2bfefb-dirty
build type RELEASE
built by None at 11 Jan 2022 01:08:09 UTC on 4cf70af93dc4
{noformat}
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