jemalloc can show the following warning:
Number of CPUs detected is not deterministic. Per-CPU arena disabled
It will be shown if one of the following returns different number of
CPUs:
- _SC_NPROCESSORS_ONLN
- _SC_NPROCESSORS_CONF
- sched_getaffinity()
And actually for my CPU linux returns different numbers, because there
are more possible CPUs then online, from dmesg:
smpboot: Allowing 128 CPUs, 64 hotplug CPUs
And from sysfs:
# grep . /sys/devices/system/cpu/{possible,online,offline}
/sys/devices/system/cpu/possible:0-127
/sys/devices/system/cpu/online:0-63
/sys/devices/system/cpu/offline:64-127
From ACPI:
# acpidump -o acpi
# acpixtract -a acpi
# iasl -d *.dat
# grep -e 'Processor Enabled' apic.dsl | sort | uniq -c
64 Processor Enabled : 0
64 Processor Enabled : 1
So I guess this is the same as what happened in this perf run [1].
[1]: https://s3.amazonaws.com/clickhouse-test-reports/51360/5d43a64112711b339b82b1c0e8df7882546a1a3c/performance_comparison_[4_4]/report.html
P.S. personally I, just use cmdline=possible_cpus=64 to fix this for my
setup.
Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>
* Add zookeeper name in endpoint id
When we migrate a replicated table from one zookeeper cluster to
another (the reason why we migration is that zookeeper's load is
too high), we will create a new table with the same zpath, but it
will fail and the old table will be in trouble.
Here is some infomation:
1.old table:
CREATE TABLE a1 (`id` UInt64)
ENGINE = ReplicatedMergeTree('/clickhouse/tables/default/a1/{shard}', '{replica}')
ORDER BY (id);
2.new table:
CREATE TABLE a2 (`id` UInt64)
ENGINE = ReplicatedMergeTree('aux1:/clickhouse/tables/default/a1/{shard}', '{replica}')
ORDER BY (id);
3.error info:
<Error> executeQuery: Code: 220. DB::Exception: Duplicate interserver IO endpoint:
DataPartsExchange:/clickhouse/tables/default/a1/01/replicas/02.
(DUPLICATE_INTERSERVER_IO_ENDPOINT)
<Error> InterserverIOHTTPHandler: Code: 221. DB::Exception: No interserver IO endpoint
named DataPartsExchange:/clickhouse/tables/default/a1/01/replicas/02.
(NO_SUCH_INTERSERVER_IO_ENDPOINT)
* Revert "Add zookeeper name in endpoint id"
This reverts commit 9deb75b249619b7abdd38e3949ca8b3a76c9df8e.
* Add zookeeper name in endpoint id
When we migrate a replicated table from one zookeeper cluster to
another (the reason why we migration is that zookeeper's load is
too high), we will create a new table with the same zpath, but it
will fail and the old table will be in trouble.
* Fix incompatible with a new setting
* add a test, fix other issues
* Update 02442_auxiliary_zookeeper_endpoint_id.sql
* Update 02735_system_zookeeper_connection.reference
* Update 02735_system_zookeeper_connection.sql
* Update run.sh
* Remove the 'no-fasttest' tag
* Update 02442_auxiliary_zookeeper_endpoint_id.sql
---------
Co-authored-by: Alexander Tokmakov <tavplubix@clickhouse.com>
Co-authored-by: Alexander Tokmakov <tavplubix@gmail.com>
