---
sourceDocument: Yokohama IT Operations Management
sourceDocumentLink: https://servicenow-prod.fluidtopics.net/r/yokohama/it-operations-management

 Release :

    - yokohama

ft:locale :

    - en-US

ft:publication_title :

    - Yokohama IT Operations Management

ft:clusterId :

    - itom

bundleId :

    - itom

workflow :

    - Technology


---

# Varnish default checks and policies

# Varnish default checks and policies {#ariaid-title1}

* Release version: Yokohama
* 
* Updated January 30, 2025
* 
* ![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read

Agent Client Collector provides the following default checks and policies for Varnish monitoring.
{#varnish-policies-checks__table_bbw_1tt_f5b__entry__5}

| Type | Check | Description | Usage | Output |
|-|-|-|-|-|
| Metric | app.varnish.metrics-varnish | Collects Varnish metrics from the host. | `linuxchecks metrics-varnish (options)` where: * -t = fields List of required metrics, comma separated within "" * -v = varnishname The Varnish instance to retrieve data from. {#varnish-policies-checks__ul_jcn_nzt_f5b} | hostname.MAIN_sess_conn 175 1649420020 hostname.MAIN_sess_drop 0 1649420020 hostname.MAIN_client_req 173 1649420020 hostname.MAIN_cache_hit 0 1649420020 hostname.MAIN_cache_hitpass 0 1649420020 hostname.MAIN_cache_miss 167 1649420020 hostname.MAIN_backend_conn 0 1649420020 hostname.MAIN_backend_unhealthy 0 1649420020 hostname.MAIN_backend_busy 0 1649420020 hostname.MAIN_backend_fail 171 1649420020 hostname.MAIN_backend_reuse 0 1649420020 hostname.MAIN_backend_recycle 0 1649420020 hostname.MAIN_threads 200 1649420020 hostname.MAIN_threads_limited 0 1649420020 hostname.MAIN_threads_created 200 1649420020 hostname.MAIN_threads_failed 0 1649420020 hostname.MAIN_thread_queue_len 0 1649420020 hostname.MAIN_sess_queued 0 1649420020 hostname.MAIN_n_expired 167 1649420020 hostname.MAIN_n_lru_nuked 0 1649420020 hostname.MAIN_backend_req 0 1649420020 |
[Table 1. Varnish metrics policy]

{#varnish-policies-checks__table_bbw_1tt_f5b}