Build Periodically Doesn't Work Anymore

Hello Community,
In Jenkins jobs there is an option to build periodically. But it doesn’t work in our Jenkins anymore. I think it might be related to our job count which is more than 10k.
When i set it to * * * * * it works not in a minute but works every once in 6 or 7 minutes.
Beside that i have crucial jobs, they are set to H(00-20) 0,1,2,3,4,5,6,7,8,9,12,17,18,19,20,21,22,23 * * * but these dont work also. it skips most of the hours and if the run jobs its not in the 00-20 minute range.

Do you have any idea why is this might be happening?


Jenkins setup:
Jenkins: 2.426.3
OS: Linux - 5.4.0-208-generic
Java: 11.0.26 - Ubuntu (OpenJDK 64-Bit Server VM)

AnchorChain:1.0
Office-365-Connector:4.21.0
PrioritySorter:5.1.0
ace-editor:1.1
active-directory:2.35
analysis-core:1.96
android-emulator:592.vb_b_6d427f1923
android-lint:2.6
ansible:307.va_1f3ef06575a_
ansicolor:1.0.4
ant:497.v94e7d9fffa_b_9
antisamy-markup-formatter:162.v0e6ec0fcfcf6
any-buildstep:14.ve115ec1484f0
apache-httpcomponents-client-4-api:4.5.14-208.v438351942757
authentication-tokens:1.53.v1c90fd9191a_b_
authorize-project:1.7.1
azure-commons:1.1.3
badge:1.9.1
blueocean:1.23.2
blueocean-autofavorite:1.2.5
blueocean-bitbucket-pipeline:1.23.2
blueocean-commons:1.27.11
blueocean-config:1.23.2
blueocean-core-js:1.27.11
blueocean-dashboard:1.23.2
blueocean-display-url:2.3.1
blueocean-events:1.23.2
blueocean-executor-info:1.23.2
blueocean-git-pipeline:1.23.2
blueocean-github-pipeline:1.23.2
blueocean-i18n:1.27.11
blueocean-jira:1.27.11
blueocean-jwt:1.27.11
blueocean-personalization:1.23.2
blueocean-pipeline-api-impl:1.23.2
blueocean-pipeline-editor:1.23.2
blueocean-pipeline-scm-api:1.23.2
blueocean-rest:1.27.11
blueocean-rest-impl:1.23.2
blueocean-web:1.27.11
bootstrap4-api:4.6.0-6
bootstrap5-api:5.3.3-1
bouncycastle-api:2.30.1.78.1-248.ve27176eb_46cb_
branch-api:2.1152.v6f101e97dd77
build-blocker-plugin:1.7.9
build-failure-analyzer:2.5.0
build-metrics:1.3
build-monitor-plugin:1.13+build.202201101632
build-name-setter:2.4.1
build-pipeline-plugin:2.0.1
build-timeout:1.32
build-token-root:151.va_e52fe3215fc
build-user-vars-plugin:1.9
built-on-column:1.4
caffeine-api:3.1.8-133.v17b_1ff2e0599
checks-api:2.0.2
cloud-stats:336.v788e4055508b_
cloudbees-bitbucket-branch-source:773.v4b_9b_005b_562b_
cloudbees-disk-usage-simple:203.v3f46a_7462b_1a_
cloudbees-folder:6.858.v898218f3609d
command-launcher:107.v773860566e2e
commons-lang3-api:3.13.0-62.v7d18e55f51e2
commons-text-api:1.11.0-95.v22a_d30ee5d36
conditional-buildstep:1.4.3
configurationslicing:1.47
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cors-filter:1.1
credentials:1337.v60b_d7b_c7b_c9f
credentials-binding:657.v2b_19db_7d6e6d
crowdstrike-security:1.2.1
crowdstrike-security-plugin:1.0.0-SNAPSHOT (private-43e8ede8-root)
custom-view-tabs:1.3
cvs:2.19.1
dark-theme:439.vdef09f81f85e
dashboard-view:2.508.va_74654f026d1
data-tables-api:2.0.1-1
datadog:7.2.1
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delivery-pipeline-plugin:1.4.2
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dependency-track:4.3.1
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display-url-api:2.200.vb_9327d658781
docker-commons:1.19
docker-workflow:1.23
dtkit-api:3.0.2
durable-task:550.v0930093c4b_a_6
dynamic-search-view:0.4.0
echarts-api:5.5.0-1
email-ext:2.105
envinject:2.908.v66a_774b_31d93
envinject-api:1.199.v3ce31253ed13
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external-monitor-job:215.v2e88e894db_f8
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font-awesome-api:6.5.1-3
git:5.2.1
git-changelog:3.23
git-client:4.7.0
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git-server:1.11
github:1.39.0
github-api:1.318-461.v7a_c09c9fa_d63
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google-oauth-plugin:1.330.vf5e86021cb_ec
gradle:1.39.4
groovy-postbuild:2.5
gson-api:2.10.1-15.v0d99f670e0a_7
handlebars:3.0.8
handy-uri-templates-2-api:2.1.8-30.v7e777411b_148
htmlpublisher:1.33
http_request:1.18
hudson-wsclean-plugin:1.0.8
icon-shim:3.0.0
ignore-committer-strategy:1.0.4
instance-identity:185.v303dc7c645f9
ionicons-api:74.v93d5eb_813d5f
jackson2-api:2.16.2-378.v7e79818f53ce
jakarta-activation-api:2.1.3-1
jakarta-mail-api:2.1.3-1
javadoc:243.vb_b_503b_b_45537
javax-activation-api:1.2.0-6
javax-mail-api:1.6.2-9
jaxb:2.3.9-1
jdk-tool:73.vddf737284550
jenkins-design-language:1.27.11
jenkins-multijob-plugin:625.v3a_1ef0311fe7
jersey2-api:2.41-133.va_03323b_a_1396
jira:3.12
jjwt-api:0.11.5-77.v646c772fddb_0
jnr-posix-api:3.1.19-1
job-dsl:1.87
job-import-plugin:3.6
jobConfigHistory:1229.v3039470161a_d
joda-time-api:2.12.7-29.v5a_b_e3a_82269a_
jqs-monitoring:37.vf50a_82a_0b_f32
jquery:1.12.4-1
jquery-detached:1.2.1
jquery-ui:1.0.2
jquery3-api:3.7.1-2
jsch:0.2.16-86.v42e010d9484b_
json-api:20240303-41.v94e11e6de726
json-path-api:2.9.0-33.v2527142f2e1d
junit:1259.v65ffcef24a_88
kubernetes:1.25.7
kubernetes-client-api:4.9.1-1
kubernetes-credentials:0.6.2
last-changes:2.7.11
ldap:711.vb_d1a_491714dc
leastload:3.0.0
locale:431.v3435fa_8f8445
localization-support:1.2
lockable-resources:1243.v346d600eea_24
log-parser:2.3.3
logstash:2.5.0218.v0a_ff8fefc12b_
mail-watcher-plugin:1.19
mailer:470.vc91f60c5d8e2
mapdb-api:1.0.9-28.vf251ce40855d
mashup-portlets-plugin:1.1.2
mask-passwords:173.v6a_077a_291eb_5
matrix-auth:3.2.2
matrix-project:822.824.v14451b_c0fd42
maven-plugin:3.23
mercurial:1260.vdfb_723cdcc81
metrics:4.2.21-449.v6960d7c54c69
microcks-jenkins-plugin:0.4.0
mina-sshd-api-common:2.12.0-90.v9f7fb_9fa_3d3b_
mina-sshd-api-core:2.12.0-90.v9f7fb_9fa_3d3b_
momentjs:1.1.1
monitoring:1.98.0
msbuild:1.30
mstest:1.0.5
mstestrunner:1.5.0
naginator:1.436.vb_e769dcb_cdf6
nested-view:1.33
nexus-jenkins-plugin:3.19.0-01
nodelabelparameter:1.12.0
nunit:485.ve8a_85357320d
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okhttp-api:4.11.0-172.vda_da_1feeb_c6e
openshift-login:1.1.0.248.v1908df5c4f5e
pam-auth:1.10
parameterized-trigger:787.v665fcf2a_830b_
percentage-du-node-column:0.1.0
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plain-credentials:179.vc5cb_98f6db_38
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plugin-util-api:4.1.0
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popper-api:1.16.1-3
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port-allocator:1.10
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pragprog:2.0.0
prisma-cloud-jenkins-plugin:22.01.880
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sonar-quality-gates:1.3.1
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ssh:2.6.1
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tfs:5.157.1-SNAPSHOT (private-2163c3ae-gilad)
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uno-choice:2.8.1
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ws-cleanup:0.45
xcode-plugin:2.0.15
xunit:3.1.4

Do you have enough executors over all agents and you don’t get queueing in Jenkins?

hello, yes i have. at night most of them are idle. but still… its strange to me that i created a test job and gave it * * * * * but it triggers every 6-7 minutes. not less not more.
i have the same timezone on my jenkins controller and jenkins ui btw.