CheckMK SNMP - Wrong number of cores detected

CheckMK version: 2.2.0p7 RAW edition
OS version: Ubuntu 22.04 LTS

Hi guys. I have several CloudLinux 6 (CentOS 6) forks need to be monitored. I know that it’s out of support, so I’ve used SNMP for service discovery.
All looks good, except of number of cores detected (1 instead of 24).

Could someone help me to get it set to the correct value? Is there any way I can set it manually?

Thank you!

Output of cmk --debug -vvn
**Sensetive information has been replaced

OMD[monitoring]:~$ cmk --debug -vvn MYREPLACEDHOSTNAME
Checkmk version 2.2.0p7
+ FETCHING DATA
  Source: SourceInfo(hostname='MYREPLACEDHOSTNAME', ipaddress='0.0.0.0', ident='snmp', fetcher_type=<FetcherType.SNMP: 7>, source_type=<SourceType.HOST: 1>)
[cpu_tracking] Start [7f0149f0a510]
Read from cache: SNMPFileCache(MYREPLACEDHOSTNAME, path_template=/omd/sites/monitoring/tmp/check_mk/data_source_cache/snmp/{mode}/{hostname}, max_age=MaxAge(checking=0, discovery=120, inventory=120), simulation=False, use_only_cache=False, file_cache_mode=6)
Not using cache (Too old. Age is 11 sec, allowed is 0 sec)
[SNMPFetcher] Execute data source
  SNMP scan:
       Getting OID .1.3.6.1.2.1.1.1.0: Running 'snmpget -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -On -OQ -Oe -Ot 0.0.0.0 .1.3.6.1.2.1.1.1.0'
SNMP answer: ==> ["Linux MYREPLACEDHOSTNAME 2.6.32-954.3.5.lve1.4.79.1.el6.x86_64 #1 SMP Tue Jul 28 05:24:18 EDT 2020 x86_64"]
b'Linux MYREPLACEDHOSTNAME 2.6.32-954.3.5.lve1.4.79.1.el6.x86_64 #1 SMP Tue Jul 28 05:24:18 EDT 2020 x86_64'
       Getting OID .1.3.6.1.2.1.1.2.0: Running 'snmpget -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -On -OQ -Oe -Ot 0.0.0.0 .1.3.6.1.2.1.1.2.0'
SNMP answer: ==> [.1.3.6.1.4.1.8072.3.2.10]
b'.1.3.6.1.4.1.8072.3.2.10'
       Using cached OID .1.3.6.1.2.1.1.1.0: 'Linux MYREPLACEDHOSTNAME 2.6.32-954.3.5.lve1.4.79.1.el6.x86_64 #1 SMP Tue Jul 28 05:24:18 EDT 2020 x86_64'
       Using cached OID .1.3.6.1.2.1.1.1.0: 'Linux MYREPLACEDHOSTNAME 2.6.32-954.3.5.lve1.4.79.1.el6.x86_64 #1 SMP Tue Jul 28 05:24:18 EDT 2020 x86_64'
       Using cached OID .1.3.6.1.2.1.1.1.0: 'Linux MYREPLACEDHOSTNAME 2.6.32-954.3.5.lve1.4.79.1.el6.x86_64 #1 SMP Tue Jul 28 05:24:18 EDT 2020 x86_64'
       Using cached OID .1.3.6.1.2.1.1.1.0: 'Linux MYREPLACEDHOSTNAME 2.6.32-954.3.5.lve1.4.79.1.el6.x86_64 #1 SMP Tue Jul 28 05:24:18 EDT 2020 x86_64'
       Using cached OID .1.3.6.1.2.1.1.1.0: 'Linux MYREPLACEDHOSTNAME 2.6.32-954.3.5.lve1.4.79.1.el6.x86_64 #1 SMP Tue Jul 28 05:24:18 EDT 2020 x86_64'
       Using cached OID .1.3.6.1.2.1.1.2.0: '.1.3.6.1.4.1.8072.3.2.10'
       Using cached OID .1.3.6.1.2.1.1.2.0: '.1.3.6.1.4.1.8072.3.2.10'
       Using cached OID .1.3.6.1.2.1.1.1.0: 'Linux MYREPLACEDHOSTNAME 2.6.32-954.3.5.lve1.4.79.1.el6.x86_64 #1 SMP Tue Jul 28 05:24:18 EDT 2020 x86_64'
       Using cached OID .1.3.6.1.2.1.1.1.0: 'Linux MYREPLACEDHOSTNAME 2.6.32-954.3.5.lve1.4.79.1.el6.x86_64 #1 SMP Tue Jul 28 05:24:18 EDT 2020 x86_64'
       Using cached OID .1.3.6.1.2.1.1.1.0: 'Linux MYREPLACEDHOSTNAME 2.6.32-954.3.5.lve1.4.79.1.el6.x86_64 #1 SMP Tue Jul 28 05:24:18 EDT 2020 x86_64'
       Using cached OID .1.3.6.1.2.1.1.1.0: 'Linux MYREPLACEDHOSTNAME 2.6.32-954.3.5.lve1.4.79.1.el6.x86_64 #1 SMP Tue Jul 28 05:24:18 EDT 2020 x86_64'
       Using cached OID .1.3.6.1.2.1.1.2.0: '.1.3.6.1.4.1.8072.3.2.10'
       Using cached OID .1.3.6.1.2.1.1.1.0: 'Linux MYREPLACEDHOSTNAME 2.6.32-954.3.5.lve1.4.79.1.el6.x86_64 #1 SMP Tue Jul 28 05:24:18 EDT 2020 x86_64'
   SNMP scan found                    hr_mem snmp_uptime ucd_cpu_load
Trying to acquire lock on /omd/sites/monitoring/tmp/check_mk/snmp_scan_cache/MYREPLACEDHOSTNAME.0.0.0.0
Got lock on /omd/sites/monitoring/tmp/check_mk/snmp_scan_cache/MYREPLACEDHOSTNAME.0.0.0.0
Releasing lock on /omd/sites/monitoring/tmp/check_mk/snmp_scan_cache/MYREPLACEDHOSTNAME.0.0.0.0
Released lock on /omd/sites/monitoring/tmp/check_mk/snmp_scan_cache/MYREPLACEDHOSTNAME.0.0.0.0
hr_cpu: Fetching data (SNMP walk cache is enabled: Use any locally cached information)
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.25.3.3.1.2'
ucd_cpu_load: Fetching data (SNMP walk cache is enabled: Use any locally cached information)
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.4.1.2021.10.1.5'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.4.1.2021.10.1.6'
hr_fs: Fetching data (SNMP walk cache is enabled: Use any locally cached information)
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.25.2.3.1.2'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.25.2.3.1.3'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.25.2.3.1.4'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.25.2.3.1.5'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.25.2.3.1.6'
hr_mem: Fetching data (SNMP walk cache is enabled: Use any locally cached information)
Already fetched OID: .1.3.6.1.2.1.25.2.3.1.2
Already fetched OID: .1.3.6.1.2.1.25.2.3.1.3
Already fetched OID: .1.3.6.1.2.1.25.2.3.1.4
Already fetched OID: .1.3.6.1.2.1.25.2.3.1.5
Already fetched OID: .1.3.6.1.2.1.25.2.3.1.6
if64: Fetching data (SNMP walk cache is enabled: Use any locally cached information)
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.2.2.1.1'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.2.2.1.2'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.2.2.1.3'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.2.2.1.5'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.2.2.1.8'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.31.1.1.1.6'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.31.1.1.1.7'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.31.1.1.1.8'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.31.1.1.1.9'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.2.2.1.13'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.2.2.1.14'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.31.1.1.1.10'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.31.1.1.1.11'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.31.1.1.1.12'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.31.1.1.1.13'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.2.2.1.19'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.2.2.1.20'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.2.2.1.21'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.31.1.1.1.18'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.2.2.1.6'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.31.1.1.1.15'
snmp_info: Fetching data (SNMP walk cache is enabled: Use any locally cached information)
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.1.1'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.1.2'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.1.4'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.1.5'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.1.6'
snmp_uptime: Fetching data (SNMP walk cache is enabled: Use any locally cached information)
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.1.3'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.2.1.25.1.1'
ucd_diskio: Fetching data (SNMP walk cache is enabled: Use any locally cached information)
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.4.1.2021.13.15.1.1.1'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.4.1.2021.13.15.1.1.2'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.4.1.2021.13.15.1.1.3'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.4.1.2021.13.15.1.1.4'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.4.1.2021.13.15.1.1.5'
Running 'snmpbulkwalk -Cr10 -v3 -l authPriv -a md5 -u MYREPLACEDSNMP -A MYREPLACEDSNMP -x DES -X MYREPLACEDSNMP -m "" -M "" -Cc -OQ -OU -On -Ot 0.0.0.0 .1.3.6.1.4.1.2021.13.15.1.1.6'
Write data to cache file /omd/sites/monitoring/tmp/check_mk/data_source_cache/snmp/checking/MYREPLACEDHOSTNAME
Trying to acquire lock on /omd/sites/monitoring/tmp/check_mk/data_source_cache/snmp/checking/MYREPLACEDHOSTNAME
Got lock on /omd/sites/monitoring/tmp/check_mk/data_source_cache/snmp/checking/MYREPLACEDHOSTNAME
Releasing lock on /omd/sites/monitoring/tmp/check_mk/data_source_cache/snmp/checking/MYREPLACEDHOSTNAME
Released lock on /omd/sites/monitoring/tmp/check_mk/data_source_cache/snmp/checking/MYREPLACEDHOSTNAME
[cpu_tracking] Stop [7f0149f0a510 - Snapshot(process=posix.times_result(user=0.039999999999999813, system=0.019999999999999962, children_user=2.66, children_system=0.17, elapsed=3.8399999998509884))]
  Source: SourceInfo(hostname='MYREPLACEDHOSTNAME', ipaddress='0.0.0.0', ident='piggyback', fetcher_type=<FetcherType.PIGGYBACK: 4>, source_type=<SourceType.HOST: 1>)
[cpu_tracking] Start [7f0149f05290]
Read from cache: NoCache(MYREPLACEDHOSTNAME, path_template=/dev/null, max_age=MaxAge(checking=0.0, discovery=0.0, inventory=0.0), simulation=False, use_only_cache=False, file_cache_mode=1)
[PiggybackFetcher] Execute data source
No piggyback files for 'MYREPLACEDHOSTNAME'. Skip processing.
No piggyback files for '0.0.0.0'. Skip processing.
[cpu_tracking] Stop [7f0149f05290 - Snapshot(process=posix.times_result(user=0.0, system=0.0, children_user=0.0, children_system=0.0, elapsed=0.0))]
+ PARSE FETCHER RESULTS
No persisted sections
No persisted sections
  HostKey(hostname='MYREPLACEDHOSTNAME', source_type=<SourceType.HOST: 1>)  -> Add sections: ['hr_cpu', 'hr_fs', 'hr_mem', 'if64', 'snmp_info', 'snmp_uptime', 'ucd_cpu_load', 'ucd_diskio']
  HostKey(hostname='MYREPLACEDHOSTNAME', source_type=<SourceType.HOST: 1>)  -> Add sections: []
Received no piggyback data
[cpu_tracking] Start [7f0149f20bd0]
value store: synchronizing
Trying to acquire lock on /omd/sites/monitoring/tmp/check_mk/counters/MYREPLACEDHOSTNAME
Got lock on /omd/sites/monitoring/tmp/check_mk/counters/MYREPLACEDHOSTNAME
value store: loading from disk
Releasing lock on /omd/sites/monitoring/tmp/check_mk/counters/MYREPLACEDHOSTNAME
Released lock on /omd/sites/monitoring/tmp/check_mk/counters/MYREPLACEDHOSTNAME
CPU load             15 min load: 6.80 (warn/crit at 5.00/10.00)(!), 15 min load per core: 6.80 (1 cores)
CPU utilization      Total CPU: 35.29%
Disk IO loop0        [17], Read: 0.00 B/s, Write: 0.00 B/s
Disk IO loop1        [18], Read: 0.00 B/s, Write: 0.00 B/s
Disk IO loop2        [19], Read: 0.00 B/s, Write: 0.00 B/s
Disk IO loop3        [20], Read: 0.00 B/s, Write: 0.00 B/s
Disk IO loop4        [21], Read: 0.00 B/s, Write: 0.00 B/s
Disk IO loop5        [22], Read: 0.00 B/s, Write: 0.00 B/s
Disk IO loop6        [23], Read: 0.00 B/s, Write: 0.00 B/s
Disk IO loop7        [24], Read: 0.00 B/s, Write: 0.00 B/s
Disk IO ram0         [1], Read: 0.00 B/s, Write: 0.00 B/s
Disk IO ram1         [2], Read: 0.00 B/s, Write: 0.00 B/s
Disk IO ram10        [11], Read: 0.00 B/s, Write: 0.00 B/s
Disk IO ram11        [12], Read: 0.00 B/s, Write: 0.00 B/s
Disk IO ram12        [13], Read: 0.00 B/s, Write: 0.00 B/s
Disk IO ram13        [14], Read: 0.00 B/s, Write: 0.00 B/s
Disk IO ram14        [15], Read: 0.00 B/s, Write: 0.00 B/s
Disk IO ram15        [16], Read: 0.00 B/s, Write: 0.00 B/s
Disk IO ram2         [3], Read: 0.00 B/s, Write: 0.00 B/s
Disk IO ram3         [4], Read: 0.00 B/s, Write: 0.00 B/s
Disk IO ram4         [5], Read: 0.00 B/s, Write: 0.00 B/s
Disk IO ram5         [6], Read: 0.00 B/s, Write: 0.00 B/s
Disk IO ram6         [7], Read: 0.00 B/s, Write: 0.00 B/s
Disk IO ram7         [8], Read: 0.00 B/s, Write: 0.00 B/s
Disk IO ram8         [9], Read: 0.00 B/s, Write: 0.00 B/s
Disk IO ram9         [10], Read: 0.00 B/s, Write: 0.00 B/s
Disk IO sda          [25], Read: -282 MB/s, Write: 1.89 MB/s
Disk IO sda1         [26], Read: 0.00 B/s, Write: 0.00 B/s
Disk IO sda2         [27], Read: 8.94 kB/s, Write: 16.5 kB/s
Disk IO sda3         [28], Read: 0.00 B/s, Write: 0.00 B/s
Disk IO sda4         [29], Read: 0.00 B/s, Write: 0.00 B/s
Disk IO sda5         [30], Read: 796 kB/s, Write: 303 kB/s
Disk IO sda6         [31], Read: 526 kB/s, Write: 1.35 MB/s
Disk IO sda7         [32], Read: 0.00 B/s, Write: 53.6 kB/s
Disk IO sda8         [33], Read: 0.00 B/s, Write: 8.40 kB/s
Disk IO sda9         [34], Read: 708 kB/s, Write: 164 kB/s
Filesystem /         Used: 66.00% - 6.41 GiB of 9.72 GiB (warn/crit at 82.67%/94.22% used), trend per 1 day 0 hours: +4.24 MiB, trend per 1 day 0 hours: +0.04%, Time left until disk full: 2 years 67 days
Filesystem /boot     Used: 30.81% - 150 MiB of 488 MiB (warn/crit at 68.33%/89.44% used), trend per 1 day 0 hours: +0 B, trend per 1 day 0 hours: +0%
Filesystem /dev/shm  Used: <0.01% - 1.01 MiB of 31.4 GiB (warn/crit at 86.29%/95.43% used), trend per 1 day 0 hours: +2.12 KiB, trend per 1 day 0 hours: +<0.01%, Time left until disk full: 42483 years 189 days
Filesystem /home     Used: 89.87% - 709 GiB of 789 GiB (warn/crit at 92.81%/97.60% used), trend per 1 day 0 hours: +1.04 GiB, trend per 1 day 0 hours: +0.13%, Time left until disk full: 77 days 0 hours
Filesystem /home2    Used: 90.44% - 783 GiB of 866 GiB (warn/crit at 92.94%/97.65% used), trend per 1 day 0 hours: +2.01 GiB, trend per 1 day 0 hours: +0.23%, Time left until disk full: 41 days 4 hours
Filesystem /tmp      Used: 1.41% - 140 MiB of 9.72 GiB (warn/crit at 82.67%/94.22% used), trend per 1 day 0 hours: +18.2 MiB, trend per 1 day 0 hours: +0.18%, Time left until disk full: 1 year 173 days
Filesystem /usr      Used: 74.42% - 36.5 GiB of 49.1 GiB (warn/crit at 87.47%/95.82% used), trend per 1 day 0 hours: +33.6 MiB, trend per 1 day 0 hours: +0.07%, Time left until disk full: 1 year 17 days
Filesystem /var      Used: 84.49% - 83.1 GiB of 98.3 GiB (warn/crit at 89.09%/96.36% used), trend per 1 day 0 hours: +3.28 GiB, trend per 1 day 0 hours: +3.34%, Time left until disk full: 4 days 15 hours
Filesystem /var/tmp  Used: 1.41% - 140 MiB of 9.72 GiB (warn/crit at 82.67%/94.22% used), trend per 1 day 0 hours: +18.2 MiB, trend per 1 day 0 hours: +0.18%, Time left until disk full: 1 year 173 days
Interface 3          [eth1], (up), MAC: 00:25:90:AB:3A:53, Speed: 1 GBit/s, In: 76.7 kB/s (0.06%), Out: 1.22 MB/s (0.97%)
Memory               Total (RAM + Swap): 56.63% - 35.5 GiB of 62.7 GiB RAM, RAM: 50.58% - 31.7 GiB of 62.7 GiB, Swap: 47.47% - 3.80 GiB of 8.00 GiB
SNMP Info            Linux MYREPLACEDHOSTNAME 2.6.32-954.3.5.lve1.4.79.1.el6.x86_64 #1 SMP Tue Jul 28 05:24:18 EDT 2020 x86_64, MYREPLACEDHOSTNAME
Uptime               Up since Jul 04 2023 09:45:08, Uptime: 99 days 4 hours
No piggyback files for 'MYREPLACEDHOSTNAME'. Skip processing.
No piggyback files for '0.0.0.0'. Skip processing.
[cpu_tracking] Stop [7f0149f20bd0 - Snapshot(process=posix.times_result(user=0.040000000000000036, system=0.010000000000000009, children_user=0.0, children_system=0.0, elapsed=0.03999999910593033))]
[snmp] Success, [piggyback] Success (but no data found for this host), execution time 3.9 sec | execution_time=3.880 user_time=0.080 system_time=0.030 children_user_time=2.660 children_system_time=0.170 cmk_time_snmp=0.950 cmk_time_agent=0.000

You could try to install an old checkmk agent (1.4, 1.5 or 1.6) on these old systems.
A newer checkmk should be able to still parse the older agent’s data.

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Thank you very much, I found check-mk-agent-1.6.0p30-1.noarch.rpm and it worked like a charm. Appreciate your help!

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