Recommended Free Tools
To target 7% of Langfuse traces, set the client-side sampling rate to 0.07. That deliberately leaves most traces—and all observations and scores attached to unsampled traces—out of Langfuse. Separately, Langfuse’s trace-retention setting does not necessarily control ClickHouse’s own system logs: tables such as trace_log, text_log, and opentelemetry_span_log can grow without a TTL. Check those tables before concluding that retained Langfuse traces are responsible for disk growth.
How do I sample only 7% of Langfuse traces?
Sampling is configured on the client, where the Langfuse SDK decides whether to send a trace. The documented setting accepts a rate from 0 to 1, with a default of 1 (all traces). Set it to 0.07 for a 7% trace-sampling target. Depending on the SDK, the configuration is exposed as sample_rate, sampleRate, or the LANGFUSE_SAMPLE_RATE environment variable. See Langfuse’s sampling documentation for the applicable SDK configuration.
As an Amazon Associate I earn from qualifying purchases.
The title’s 7% is the intended rate, not evidence that exactly 7% of a particular person’s agent executions were captured. Actual captured counts can vary, especially across a small number of traces.
Do these 3 things before closing this tab:
1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minuteWhat sampling removes
Langfuse makes the decision at the trace level. If a trace is not sampled, its observations and associated scores are not sent either. Sampling therefore reduces trace volume, but it also creates intentional gaps: the resulting data is not a complete accounting of agent runs, tool calls, or outcomes. Lower the rate only if that loss of visibility is acceptable for your debugging, evaluation, and monitoring needs.
#1 Best Overall
Why is ClickHouse logging itself?
ClickHouse maintains its own system logs to record server activity. Langfuse’s self-hosted deployment requires ClickHouse; its documentation says no alternative OLAP database is supported for this deployment. The Langfuse retention feature for tracing data and media is distinct from retention for ClickHouse system tables. Langfuse warns that tables including trace_log, text_log, and opentelemetry_span_log have no TTL by default and may contribute to disk growth. The details are in the ClickHouse self-hosting guide.
That makes system-log retention a reasonable place to investigate when disk use continues to rise, but it does not establish the cause on any particular installation. Growing disk use could have another explanation; identify the tables consuming space before changing retention.
Check the installation before changing retention
- Compare table sizes over time and identify which ClickHouse tables are growing. In particular, check the system-log tables named in Langfuse’s guidance rather than assuming Langfuse trace data is responsible.
- Record the Langfuse release, deployment setup, and trace-ingestion path. Ingestion behavior can vary by SDK and version.
- Review the relevant ClickHouse configuration and determine how much diagnostic history your operators need before setting a TTL.
Langfuse documents a TTL example for system.trace_log in its ClickHouse guide. Treat it as an operational configuration choice, not a universal retention period: reducing stored logs trades disk use against the amount of historical diagnostic detail available.
PC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Outdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchCould ingestion delays look like missing traces?
Yes. Langfuse documents OpenTelemetry as its supported trace-ingestion path, and its v4 compatibility guidance notes that older SDKs or exporters that omit the v4 ingestion header can experience delays. Before interpreting gaps as a sampling problem, check the SDK or exporter version and whether the ingestion path meets the v4 requirements. The OpenTelemetry v4 compatibility guide describes the compatibility behavior.
Rank #3
- 2 Years of Cellular Service Included – Necto offers the most affordable cellular-enabled sensor with 2 full years of 4G LTE service included—no hidden fees, contracts, or WiFi required. With a built-in multi-network SIM card, you can remotely monitor conditions 24/7 and receive real-time alerts. After 2 years, you can renew the subscription from the app for only $6.99 a month.
- Instant Alert & 24/7 Monitoring - Keep tabs on your Home, RV, Car, or Pets from anywhere with the 3-in-1 temperature, humidity & power outage monitor. Customize the high and low temp/humidity thresholds and add up to 5 contacts for unlimited text and email alerts. Receive real-time alerts if critical changes in temp/humidity or a power loss occurs.
- Rechargeable Internal Battery - The Necto smart RV and pet monitor has a 3 day long-lasting rechargeable battery. Unlike WiFi sensors, Necto provides continuous monitoring in the event of a power outage, via its built-in battery and cellular technology. Receive instant alerts on your phone when battery power is low or if the device disconnects from the network.
- Intuitive Mobile App & Easy Setup - Our user-friendly mobile app gives you remote access to your sensor from anywhere. Use your smartphone or PC to customize alert thresholds, view past readings, and manage device settings with ease. The sensor takes minutes to install and requires no technical expertise. Simply activate the device through the app and plug it into any standard wall outlet.
- Fast Refresh & Free Data Storage - The industrial built-in temperature and humidity sensor takes readings every 10 seconds to make sure the temp/humidity are within the safe range. Every 10 minutes the most recent reading is updated on the online portal. Readings are stored on our servers for 1 year and can be downloaded anytime on a CSV file.
In Langfuse v4 specifically, events_full is the immutable, full-fidelity event table, while events_core is a query-optimized projection. LLM calls, tool executions, and agent steps appear as rows with trace-level attributes. These table names describe the v4 model; do not assume they apply to older installations. See the v4 data-model documentation.
How should sensitive trace data be handled?
Sampling is not a privacy control: a sampled trace can still contain sensitive content. Langfuse documents client-side masking. Centralized server-side ingestion masking for self-hosted deployments is an Enterprise feature, and Langfuse describes it as a safety net rather than a replacement for client-side masking when sensitive data must not leave the application boundary. Review the masking documentation and apply the controls appropriate to your data before traces are sent.
Rank #4
- 【Remote Control Operations Server】Sipeed NanoKVM is an IP-KVM solution based on the LicheeRV Nano RISC-V Linux single-board computer, inheriting the Nano's compact form factor and powerful capabilities. Breaking free from traditional host requirements for network connectivity and system software, NanoKVM functions as an external hardware device directly providing remote control capabilities.
- 【Powerful Interfaces】Sipeed NanoKVM features one HDMI input port that can be recognized by a computer as a display to capture screen content. One USB 2.0 port connects to the computer host, functioning as a HID device (e.g., keyboard, mouse, touchpad). It also utilizes spare TF card storage space, mounting it as a USB flash drive device.
- 【100Mbps Ethernet Support】Sipeed NanoKVM features a 100Mbps Ethernet port for network transmission of video and control signals. The Full version additionally includes an ATX power control interface (USB-C) for remote host power status monitoring and control. The Full version housing also incorporates an OLED display showing the device's IP address and KVM-related status.
- 【Server Management】Sipeed NanoKVM enables real-time monitoring and control of server operations. Supports remote desktop access and host power cycling: NanoKVM overcomes limitations requiring the host to be networked or specific system software, functioning as external hardware to provide direct remote control capabilities.
- 【Supports Remote Installation】Sipeed NanoKVM emulates a USB flash drive device, enabling mounting of installation images for system deployment or access to computer BIOS settings. The NanoKVM Lite features two serial ports for use with IPMI or connection to other development boards via web-based serial terminal interaction. Users may also expand functionality with additional accessories.
What the available deployment guidance does—and does not—tell you
Langfuse’s Kubernetes guide allows bundled or external data stores and recommends managed blob storage for production rather than bundled SeaweedFS. That is deployment guidance, not evidence that a particular storage change will resolve a ClickHouse disk problem. Diagnose the growing tables and the actual deployment configuration first. See the Kubernetes deployment guide.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
