Buyer’s Guide - August 2026

Best Memcached monitoring tools, ranked by people who run caches

Memcached monitoring is a narrow job: collect the stats protocol, surface hit ratio, evictions, memory fill, and connections, and alert before cache degradation becomes a user-facing slowdown. Most general-purpose platforms claim coverage, but the difference between a first-party collector with cache-specific alerts and a community plugin you wire up yourself is measured in hours of setup and missed incidents. We ranked 10 tools on metric depth, collection resolution, setup effort, alerting quality, pricing predictability, and ecosystem fit.

Start with Netdata (free) Jump to rankings

Why this list exists

Memcached failures rarely announce themselves. The process stays up, the port answers, and the only symptom is that your database gets slower because the hit ratio quietly slid from 95 percent to 70. Catching that requires a tool that actually speaks the Memcached stats protocol and knows what to do with evictions, memory fill, and connection counts, not one that checks whether the process exists.

The mistake buyers make in this category is assuming Memcached coverage is first-party everywhere. It is not. Some tools on this list auto-detect a local instance with zero configuration. Others require you to stand up an exporter, a collector pipeline, and a dashboard by hand, and a few only offer community plugins maintained outside the vendor. That gap in setup effort is the difference between monitoring your cache today and monitoring it next quarter.

Three dimensions decide the outcome for most teams:

Metric depth and resolution. Base stats (hits, misses, evictions, bytes, connections) are table stakes. Slab-class and LRU internals matter if you debug eviction pathology. Per-second collection catches eviction bursts and connection-limit spikes that 15 or 60 second polling averages away.
Alerting specificity. Pre-built alerts for memory fill, eviction rate, and connection limits beat generic host thresholds you tune by hand. The count of cache-specific alerts varies from zero to eight across this list.
Pricing shape. Cache metrics are always-on and high-frequency. Per-node and per-monitor models stay predictable; per-series and per-GB ingest models grow with cardinality and collection frequency in ways that surprise people.

A note on prices: we do not quote list prices for any vendor except Netdata, because list price is not what you will pay and quoting it misleads more than it informs. Each card describes the pricing shape and what makes the bill grow, and links the vendor’s official pricing page so you can model your own fleet. For operator-level guidance on the metrics themselves, see our Memcached monitoring runbooks.

We assembled the shortlist from tools with documented, currently maintained Memcached collection: a first-party collector, an official integration or template, or an actively maintained plugin. Tools that only check process uptime or port availability were excluded; a tool that cannot tell you hit ratio and evictions is not Memcached monitoring.

Metric depth carries the most weight (25 percent) because it determines what you can actually diagnose, followed by collection resolution (20 percent) because eviction bursts and connection-limit events are short-lived. Setup effort and alerting quality each carry 15 percent, reflecting how much assembly is required before you see a chart and whether the tool knows what a bad cache looks like out of the box. Pricing predictability (15 percent) and ecosystem fit (10 percent) round out the scoring. Interval figures marked as typical defaults come from vendor documentation; where a vendor does not publish a default, we say so.

Tester credit

Compiled by the Netdata team - Updated August 12, 2026

Sources verified

Scoring criteria

Memcached metric depth 25%
Hit/miss, evictions, memory fill, connections, operation rates, slab detail
Collection resolution 20%
Per-second vs 15s/60s polling for short-lived cache events
Deployment and setup effort 15%
First-party auto-detection vs exporter and dashboard assembly
Alerting quality 15%
Pre-built cache-specific alerts vs generic host thresholds
Pricing predictability 15%
Per-node and per-monitor vs per-series and per-GB models
Ecosystem and scale 10%
Kubernetes, ElastiCache coverage, API and dashboard extensibility

Vendor 01 / 10 · #netdata

Netdata

Real-time infrastructure monitoring with a first-party per-second Memcached collector, ML anomaly detection, and per-node pricing.

Best for

Teams that want Memcached metrics at per-second resolution without assembling an exporter plus dashboard stack
Small-to-mid fleets that want a predictable per-node bill with unlimited metrics and retention
SREs who want ML-assisted anomaly detection on cache behavior out of the box

Pricing

Per-node pricing: Cloud Business from $4.50/node/month on annual plans, decreasing per node as count grows
Free Cloud tier for small, non-commercial fleets
Open-source agent (AGPL) available to self-host; you run and operate it yourself
Unlimited metrics, logs, users, and retention included; the bill grows only with node count

Pros

First-party go.d.plugin collector reads the Memcached stats command with zero configuration and auto-detects 127.0.0.1:11211
Per-second collection by default across 14 chart groups: cache size, network, connections, items, evictions, and get/set/delete/CAS/incr/decr/touch operations
3 built-in Memcached alerts: cache memory utilization, cache fill rate, and estimated time to run out of cache space
Monitors multiple local and remote Memcached instances from one agent via go.d/memcached.conf jobs
Same agent covers host OS, containers, and the rest of the stack, so cache degradation is correlated with surrounding system metrics

Where teams pair it

The collector reads only the base stats command; teams debugging slab-class imbalance or LRU behavior will need the stats slabs detail that Datadog’s check exposes
3 Memcached-specific alerts out of the box, fewer than Zabbix’s 8 triggers or Grafana Cloud’s 4, so teams wanting more canned thresholds add their own
No built-in Memcached synthetic check (set/get round-trip probe); teams that want client-side verification pair it with an external probe

Verdict

Netdata leads this list because it is the only tool reviewed with a first-party Memcached collector that runs at per-second resolution by default, auto-detects the local instance with zero configuration, and ships cache-specific alerts at a per-node price that includes unlimited metrics and retention. There is no exporter to install, no dashboard to import, and no cardinality bill to model. The honest caveat: if your primary work is diagnosing slab-class imbalance or LRU internals, Datadog’s metric surface goes deeper, and Zabbix ships more pre-built triggers. For the far more common job of catching hit-ratio decay, eviction bursts, and memory exhaustion before users notice, Netdata is the fastest path from install to alert.

Start free -> See Netdata pricing ->

Vendor 02 / 10 · #datadog

Datadog

SaaS observability platform with a first-party Memcached Agent check collecting 70+ cache metrics including slab-class and LRU detail.

Best for

Organizations already standardized on Datadog for APM, logs, and infrastructure
Teams that need slab classes, LRU moves, eviction reasons, and per-slab hit rates
Enterprises that want a managed SaaS with 1,000+ integrations

Pricing

Per-host infrastructure monitoring plus usage-based add-ons for custom metrics, log GB, and APM spans
Bill grows with host and container count, custom metrics beyond allotment, and log/span ingest volume
Free tier capped by host count and retention; Pro and Enterprise tiers above it

Pros

First-party mcache check bundled in the Datadog Agent; no extra installation on Memcached hosts
70+ metrics including memcache.slabs.* (chunk size, pages, free chunks) and memcache.items.* (LRU hot/warm/cold moves, evicted_unfetched, tailrepairs) when enabled
Service check memcache.can_connect returns CRITICAL when the Agent cannot reach the instance
Log collection for /var/log/memcached.log and APM tracing of Memcached client calls
Supports AWS ElastiCache Memcached via CloudWatch integration and exporter-based discovery

Cons

Per-host plus usage-based pricing makes always-on cache fleets expensive as metrics, logs, and spans accumulate
Slab and item metrics require manually enabling options.slabs and options.items in mcache.d/conf.yaml
Default Agent check interval is coarser than per-second collection; finer resolution requires custom configuration

Verdict

Datadog has the deepest Memcached metric surface of any vendor reviewed. If you are chasing slab imbalance, LRU pathology, or unfetched-eviction behavior, nothing else on this list comes close. The trade-offs are cost structure and resolution: the per-host plus usage model punishes always-on, high-frequency cache telemetry, and the default check interval is coarser than per-second agents. For simple hit-ratio monitoring it is overkill; for deep cache internals at enterprise scale, it is the right tool.

Read full Netdata vs Datadog -> Datadog pricing ->

Vendor 03 / 10 · #grafana-cloud

Grafana Cloud

Managed observability whose Memcached integration pairs Grafana Alloy with the Prometheus memcached_exporter and ships prebuilt dashboard and 4 alerts.

Best for

Teams already using Grafana dashboards who want a managed backend
Prometheus users who want the memcached_exporter without running their own Prometheus
Organizations that want pre-built Memcached dashboards and alerts with volume discounts

Pricing

Usage-based: per active series for metrics, per GB for logs and traces, per host hour for Kubernetes and app observability
Bill grows with series cardinality and ingest volume; each Memcached metric dimension counts
Free tier with limited series and retention; Pro adds a platform fee plus pay-as-you-go; Enterprise is annual commit

Pros

Official integration with a pre-built Memcached Overview dashboard and 4 alerts: MemcachedDown, connection limit approaching (warning and critical), and out-of-memory errors
Built on the actively maintained prometheus/memcached_exporter (Apache-2.0)
Exporter supports multi-target /scrape mode for AWS ElastiCache Memcached fleets via prometheus-elasticache-sd
Filter Metrics option drops unused metrics to control active-series cost
Grafana OSS remains a self-hosted option with the same exporter if you prefer to operate it yourself

Cons

Requires installing and configuring Grafana Alloy with prometheus.exporter.memcached components; no auto-detection
Per-active-series billing means high-cardinality labels can grow the bill unexpectedly
Metric set is exporter-defined (about 17 core metrics) and lacks the slab-class depth of Datadog’s check

Verdict

Grafana Cloud is the cleanest managed path onto the de facto standard memcached_exporter, with a sensible alert set and a working ElastiCache story. The setup is manual (Alloy config, scrape jobs) and the billing model rewards discipline about cardinality. If your organization already thinks in PromQL and Grafana dashboards, this is a natural fit; if you want the cache detected and charted without touching YAML, look higher on this list.

Read full Netdata vs Grafana -> Grafana Cloud pricing ->

Vendor 04 / 10 · #zabbix

Zabbix

Open-source enterprise monitoring with a first-party Memcached template for Zabbix agent 2 that needs no external scripts.

Best for

Enterprises that want a self-hosted, no-license-fee platform with first-party Memcached coverage
Teams already running Zabbix for network, server, and application monitoring
Organizations that need built-in triggers and threshold macros without writing alert rules

Pricing

Open source under AGPLv3, self-hosted; you run and operate the server, database, and agents
Paid technical support subscriptions and Zabbix Cloud (SaaS) available
No per-host or per-metric license fees for the open-source edition

Pros

First-party ‘Memcached by Zabbix agent 2’ template with no external scripts; tested against Memcached 1.4, 1.5, and 1.6
25 items covering ping, connections, CPU, commands, hits/misses, evictions, bytes, items, threads, uptime, and version
8 built-in triggers: service down, no data for 30m, queued/throttled connections, connection percentage, memory usage percentage, version change, and restart detection
Configurable macros for thresholds, for example {$MEMCACHED.MEM.PUSED.MAX.WARN} defaulting to 90 percent
AGPLv3 license since 7.0 with an active release cadence

Cons

Requires operating a Zabbix server, database, and agent 2 on every Memcached host
Polling-based collection with dependent items; resolution is coarser than per-second agents
No slab-class or LRU-level metrics; the template reads the base stats command only

Verdict

Zabbix ships the most pre-built Memcached triggers of any tool reviewed, and the agent 2 template is genuinely first-party, which is rare in this category. The cost is operational: you run the whole Zabbix stack yourself, and polling-interval collection means short eviction bursts can slip between samples. For organizations already invested in Zabbix, folding Memcached into existing escalation workflows is an easy win. For teams starting fresh, the operating burden deserves honest consideration.

Read full Netdata vs Zabbix -> Zabbix pricing ->

Vendor 05 / 10 · #dynatrace

Dynatrace

Enterprise observability with a first-party Memcached extension that auto-discovers cache hosts and collects 20+ metrics.

Best for

Large enterprises already standardized on Dynatrace for full-stack observability
Teams that want automatic Memcached host discovery without manual exporter setup
Organizations that need cache metrics correlated with application traces and user sessions

Pricing

Per-host pricing (per 8 GiB host) plus usage-based add-ons for logs, traces, and metric datapoints
Bill grows with monitored host count and GiB of log/trace ingest
Foundation, Infrastructure, and Full-Stack tiers with volume and multi-year discounts

Pros

First-party extension activated from the Dynatrace Hub with no parameters required
Auto-discovery: metrics collected automatically when a new host running Memcached is detected
20+ metrics across uptime, connections, throughput, memory, evictions, malloc failures, get/set commands, hits/misses, and threads
Supports TCP, UDP, and UNIX socket connections; requires OneAgent 1.265+ and Memcached 1.4.24+
Feature sets allow segmenting monitoring configurations across highly segmented networks

Cons

Enterprise pricing model (per-host plus per-GiB) is the most expensive option here for small fleets
Narrower metric set than Datadog: no slab-class breakdown or LRU item detail
Requires OneAgent on the Memcached host; no agentless or exporter-based collection path

Verdict

Dynatrace’s Memcached extension does the core job well and the automatic host discovery is genuinely useful in large, changing environments. The value proposition is not the cache metrics themselves, which are competent but not deep, but their integration into Dynatrace’s topology, Davis AI, and full-stack correlation during incident response. If you are already a Dynatrace shop, enable it. If you are choosing a tool specifically for Memcached, the price point is hard to justify.

Read full Netdata vs Dynatrace -> Dynatrace pricing ->

Vendor 06 / 10 · #new-relic

New Relic

Usage-based observability with an open-source on-host Memcached integration (nri-memcached) reporting cache stats to New Relic.

Best for

Teams that want unlimited hosts at no per-host cost and pay primarily for data volume
Organizations already using New Relic APM who want cache metrics correlated with app performance
Small teams that can fit Memcached telemetry inside the free ingest allowance

Pricing

Usage-based: per GB of data ingest plus per-seat tiers (basic users free, core and full-platform users paid)
Bill grows with ingest volume and number of paid users
Free tier with a limited monthly ingest allowance; basic users included at no cost

Pros

First-party open-source integration nri-memcached (Apache-2.0) supporting Memcached 1.4+ on any OS
No per-host charges: unlimited hosts, agents, and containers in the platform price
Cache metrics land in the same NRQL engine as APM, logs, and traces for cross-signal correlation
Quickstart provides a pre-built Memcached dashboard

Cons

Integration is provided AS-IS without warranty or support; support requires an Expert Services subscription
Metric depth is basic: config parameters and core stats, no slab-class or LRU detail
Per-GB ingest pricing means always-on high-frequency Memcached metrics can consume the free tier quickly

Verdict

New Relic’s Memcached integration is reasonable if you already pay for the platform, and the no-per-host model is genuinely friendly to large fleets. Two caveats hold it back: the integration is officially unsupported, which matters when it breaks at 2 a.m., and the metric surface is shallow compared to Datadog, Zabbix, or Netdata. Treat it as a convenient add-on for New Relic shops, not a reason to adopt the platform.

Read full Netdata vs New Relic -> New Relic pricing ->

Vendor 07 / 10 · #signoz

SigNoz

Open-source, OpenTelemetry-native observability that monitors Memcached through the OTel Collector’s memcached receiver.

Best for

Teams standardizing on OpenTelemetry who want one backend for metrics, logs, and traces
Startups and mid-size companies looking for an open-source Datadog alternative
Developers who prefer YAML-configured collectors over proprietary agents

Pricing

Usage-based cloud: per GB of traces/logs and per million metric samples
Open-source Community Edition, self-hosted; you run and operate it yourself
Cloud starts with a base monthly fee including a usage allowance; bill grows with ingest volume

Pros

Uses the OpenTelemetry Collector’s memcached receiver with a documented 10s collection interval in the official guide
OTel-native: the same pipeline feeds Memcached metrics, host metrics, traces, and logs into one backend
Pre-built Memcached dashboard template available in SigNoz docs
Metrics follow semantic-convention naming (memcached.bytes, memcached.commands, memcached.operation_hit_ratio)
Community Edition is open source; cloud offers US, EU, and India data centers

Cons

Requires installing and configuring the OTel Collector with the memcached receiver; no auto-detection
Metric set is the receiver’s 11 metrics; no slab-class or LRU detail
Per-GB and per-sample usage pricing means high-frequency Memcached metrics grow the cloud bill

Verdict

SigNoz is the most modern architecture on this list: a documented OTel receiver, a 10-second interval, and a single pipeline for every signal. The setup is manual and the metric depth is moderate, so it rewards teams already committed to OpenTelemetry rather than teams shopping for Memcached monitoring specifically. If that is you, the community edition makes evaluation cheap and the cloud tier keeps the operational burden low.

Read full Netdata vs SigNoz -> SigNoz pricing ->

Vendor 08 / 10 · #manageengine-applications-manager

ManageEngine Applications Manager

On-premises and cloud application monitoring suite with first-party Memcached monitoring covering availability, hit ratio, memory, and request rates.

Best for

IT operations teams that want agentless, first-party Memcached monitoring in a broader APM suite
Organizations running on-premises or hybrid infrastructure that prefer a self-hosted console
Teams that need out-of-the-box reports for availability and capacity planning

Pricing

Per-monitor-count editions (Professional and Enterprise) with annual subscriptions
Bill grows with monitor count; each Memcached server consumes one monitor
Free edition with limited features; 30-day trial; add-ons priced as flat fees

Pros

First-party monitoring with documented metrics: availability, health, cache hit ratio, CPU, memory utilization, transaction time, GET/SET rates, hits/misses per minute, connections, threads, items, evictions, and response time
Agentless monitoring for Memcached alongside 150+ other applications and databases
Out-of-the-box reports for availability, performance, and capacity planning
Alerts on memory overload and connection limits to prevent undesired data replacement

Cons

Per-monitor pricing means a large Memcached fleet consumes many monitor licenses
No slab-class or LRU-level metrics; depth is comparable to Site24x7 rather than Datadog
Windows-centric management console may be a poor fit for Linux-only cache fleets

Verdict

Applications Manager covers the core Memcached signals first-party and agentless, and its reporting is genuinely useful for capacity planning reviews. The constraints are the per-monitor cost model at fleet scale and a console that feels at home in Windows-centric IT operations. For teams already running ManageEngine, enabling Memcached monitoring is an obvious step; cache-focused buyers will find more depth and fresher data elsewhere on this list.

Read full Netdata vs ManageEngine -> ManageEngine pricing ->

Vendor 09 / 10 · #site24x7

Site24x7

Cloud-based IT monitoring with a ready-to-use Memcached plugin tracking hit/miss ratio, evictions, and network throughput from one dashboard.

Best for

IT teams that want a SaaS dashboard with plugin-based Memcached monitoring and no self-hosted infrastructure
Organizations already using Site24x7 for server, website, and application monitoring
MSPs monitoring Memcached across many customer servers from one console

Pricing

Per-monitor licensing across basic, host, and advanced monitor tiers
Bill grows with monitor count, polling frequency (faster polls consume more licenses), and add-ons for logs, RUM, and synthetic runs
30-day free trial; no permanent free tier

Pros

Ready-to-use Memcached plugin from the official Site24x7 GitHub repository
Tracks bytes, bytes read/written, current and total connections, threads, evictions, and limit_maxbytes
Linux agent auto-installs the python-memcached module; the plugin executes automatically within five minutes of install
Integrates with Site24x7 alerting and reports alongside server and website monitors

Cons

Plugin-based, not a first-party collector: requires downloading memcached.py, creating a plugin folder, and manual configuration
Metric set is basic (8 metrics) with no hit/miss ratio computed out of the box, no slab detail, and no get/set command rates
Per-monitor licensing means each Memcached host consumes a host monitor license; faster polling consumes more

Verdict

Site24x7 will tell you whether your Memcached server is up and how full it is, and for some IT teams that is enough. But the shallow metric set, the manual plugin install, and the absence of computed hit ratio or command rates make it a weaker fit than every first-party option above it. Choose it when Memcached is one checkbox in a broader Site24x7 deployment, not when cache performance is the thing you are buying for.

Read full Netdata vs Site24x7 -> Site24x7 pricing ->

Vendor 10 / 10 · #checkmk

Checkmk

Open-source-rooted monitoring with a community Memcached plugin that adds auto-detection and agent bakery integration.

Best for

Teams already running Checkmk who want Memcached checks in their existing monitoring
Organizations that prefer a self-hosted platform with a per-service cost model
IT teams that value the agent bakery for distributing checks to many hosts

Pricing

Per-service subscriptions priced by number of monitored services; a Memcached host typically counts as multiple services
Open-source Raw edition, self-hosted; you run and operate it yourself
Commercial editions (Pro, Ultimate, Cloud) add support, distributed monitoring, and application observability

Pros

Actively maintained community plugin (version 6.1.0, updated September 2025) with 11 releases and 7,500+ downloads
Adds auto-detection and agent bakery integration on top of the bundled memcached treasure plugin
Reworked to support counters for rate-based metrics
Per-service pricing means a small Memcached deployment costs proportionally less than per-host models

Cons

Memcached support is a community plugin, not a first-party Checkmk integration
Requires Checkmk 2.4.0b1 or higher and manual plugin installation via MKP package
Metric depth depends on the plugin’s check implementation; no slab-class or LRU detail

Verdict

Checkmk earns a place on this list because its community Memcached plugin is unusually well maintained, with auto-detection and agent bakery support that most community plugins never get. It is still community-maintained, which means the vendor’s support contract does not cover your cache checks, and new buyers should weigh that against the first-party options. For existing Checkmk shops, install it and move on; for everyone else, start higher on the list.

Read full Netdata vs Checkmk -> Checkmk pricing ->

Frequently Asked Questions

What Memcached metrics should I monitor?

Start with cache hit ratio computed from get_hits and get_misses: a dropping ratio means keys are being evicted or TTLs are too short, and your database absorbs the difference. Watch the evictions counter, which tracks items removed before expiry because memory is full, and memory fill percent against limit_maxbytes so you can see exhaustion coming. Round out the set with current connections against the connection limit, bytes read/written, and get/set command rates. If you are diagnosing eviction pathology rather than just detecting it, add slab-class detail (stats slabs), which only some tools on this list collect.

Is there a free or open-source Memcached monitoring tool?

Several, with an honest caveat: open source means you operate it yourself, and the cost of ownership is real. Netdata’s agent is AGPL open source with a first-party per-second Memcached collector and auto-detection. Zabbix (AGPLv3 since 7.0) ships a first-party agent 2 template with 8 triggers. SigNoz Community Edition and the Checkmk Raw edition are open source with a documented OTel receiver and a community plugin respectively, and Grafana OSS can pair with the prometheus/memcached_exporter if you run your own Prometheus. In every case you are trading license fees for operating time.

How do I monitor AWS ElastiCache for Memcached?

Two paths show up in this list. Datadog covers ElastiCache Memcached through its CloudWatch integration and exporter-based discovery. Grafana Cloud’s integration uses the memcached_exporter’s multi-target /scrape mode together with prometheus-elasticache-sd for fleet discovery. If you run self-managed Memcached on EC2 rather than ElastiCache, any agent-based tool (Netdata, Datadog, Dynatrace, Zabbix) works the same as on-premises.

Why does collection resolution matter for Memcached?

Because the events that hurt you are short. An eviction burst or a connection-limit spike can last seconds, and a 15 or 60 second polling interval averages it into invisibility; you see the symptom (a database slowdown) without the cause. Per-second collection, which Netdata runs by default, preserves those spikes. SigNoz’s documented 10-second receiver interval is a reasonable middle ground. Polling-based tools still catch sustained trends like hit-ratio decay and memory exhaustion, just not the transients.

What makes a Memcached alert good?

Specificity. The pre-built alerts that matter are service down, memory fill approaching limit, eviction rate, and connections approaching the configured limit. Zabbix ships the most (8 triggers, including restart and version-change detection), Grafana Cloud ships 4, and Netdata ships 3 including an estimated time-to-run-out-of-cache-space alert that most vendors do not offer. Generic CPU and memory host alerts will not catch a cache that is healthy as a process but useless as a cache.

Best Memcached monitoring tools, ranked by people who run caches

How we evaluated Memcached monitoring tools

Netdata

Datadog

Grafana Cloud

Zabbix

Dynatrace

New Relic

SigNoz

ManageEngine Applications Manager

Site24x7

Checkmk

Frequently Asked Questions

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