Crashes, No Sound, or Screen Glitches?
Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteWindows Errors? Fix Them Before They Spread
Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallA graph that shows an error-rate spike over a day but goes blank when you zoom into the outage may have a query-window problem—not a missing-metrics problem. In a Prometheus rate query, the range must be wide enough to include multiple scrapes. Grafana’s $__interval can shrink as you zoom in, so use $__rate_interval for panel queries with rate() or increase(), and make sure Grafana’s configured scrape interval matches Prometheus.
What happened when the graph was zoomed in
In a personal case report, Sergey Shinder described a payments incident in August. The error-rate panel showed a bump over a one-day view, but selecting roughly twenty minutes around the event made the line disappear and the panel return no data. The query divided the rate of a 5xx counter by the rate of all requests, using Grafana’s $__interval as the range for both rates. Shinder’s DEV Community article is the source for the incident details; this is an author’s account, not an independently audited postmortem.
As an Amazon Associate I earn from qualifying purchases.
Shinder reported that Grafana’s interval was about two minutes on the day view. On the narrower view, it would have fallen to about two seconds, but the data source’s configured minimum interval raised it to fifteen seconds. The Prometheus service was actually scraped every sixty seconds. On that account, a fifteen-second rate window could contain at most one sample, while Prometheus needs at least two samples to calculate a rate. The query therefore returned no rate data at each step.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Why zooming can make a rate query return nothing
The query range changes with the chart
Grafana calculates $__interval from the selected time range and panel width. A wider time range generally produces a larger interval; zooming into a shorter period can reduce it. If that variable is used as the range selector inside rate(), the rate window can become too short for the target’s scrape cadence.
#1 Best Overall
- CRISP CLARITY: This 23.8″ Philips V line monitor delivers crisp Full HD 1920x1080 visuals. Enjoy movies, shows and videos with remarkable detail
- INCREDIBLE CONTRAST: The VA panel produces brighter whites and deeper blacks. You get true-to-life images and more gradients with 16.7 million colors
- THE PERFECT VIEW: The 178/178 degree extra wide viewing angle prevents the shifting of colors when viewed from an offset angle, so you always get consistent colors
- WORK SEAMLESSLY: This sleek monitor is virtually bezel-free on three sides, so the screen looks even bigger for the viewer. This minimalistic design also allows for seamless multi-monitor setups that enhance your workflow and boost productivity
- A BETTER READING EXPERIENCE: For busy office workers, EasyRead mode provides a more paper-like experience for when viewing lengthy documents
A rate needs more than one sample
Prometheus calculates a rate from samples within the range selector. If the window does not include enough samples, the expression may return no data even though the target is still emitting metrics. A blank panel alone does not prove that the service stopped producing metrics.
Use Grafana’s rate-specific interval
Grafana documents $__rate_interval for queries using rate() and increase(). Its documented calculation is max($__interval + scrape_interval, 4 * scrape_interval): it accounts for the panel interval and includes a floor of four scrape intervals. For a panel rate query, use a range such as:
Rank #2
- CRISP CLARITY: This 22 inch class (21.5″ viewable) Philips V line monitor delivers crisp Full HD 1920x1080 visuals. Enjoy movies, shows and videos with remarkable detail
- 100HZ FAST REFRESH RATE: 100Hz brings your favorite movies and video games to life. Stream, binge, and play effortlessly
- SMOOTH ACTION WITH ADAPTIVE-SYNC: Adaptive-Sync technology ensures fluid action sequences and rapid response time. Every frame will be rendered smoothly with crystal clarity and without stutter
- INCREDIBLE CONTRAST: The VA panel produces brighter whites and deeper blacks. You get true-to-life images and more gradients with 16.7 million colors
- THE PERFECT VIEW: The 178/178 degree extra wide viewing angle prevents the shifting of colors when viewed from an offset angle, so you always get consistent colors
rate(http_requests_total[$__rate_interval])Grafana’s documentation warns that this variable can still be too small if Grafana’s assumed scrape interval does not match the actual Prometheus cadence. The scrape interval used in the calculation comes from the query’s Min step when one is set; otherwise Grafana uses the data source’s Scrape interval setting. Set that data-source value to match the real Prometheus scrape configuration.
Check the query and scrape settings
- Confirm the target’s actual cadence. Check the Prometheus configuration for the affected target’s
scrape_interval. - Compare Grafana’s assumption. In Grafana, inspect the Prometheus data source’s Scrape interval setting and the panel query’s Min step, if set. The interval used by the query must reflect the real scrape cadence.
- Inspect the range selector at both zoom levels. Check whether the query uses
$__intervalinsiderate()orincrease(), and how the selected range changes between the broad view and the zoomed view. - Use a suitable panel range. Replace
$__intervalwith$__rate_intervalfor rate and increase panel queries, then verify that the data-source Scrape interval or query Min step is accurate. - Test the affected time window again. Zoom into the outage period and confirm that the rate query returns data at that resolution.
Grafana’s guidance is documented in its Prometheus template-variable documentation.
Rank #3
- Clear visuals. Fluid motion: A 144Hz refresh rate and 1ms MPRT deliver smooth, tear‑free motion across work, gaming, and streaming for clearer, more fluid viewing.
- Eye comfort: TÜV Rheinland 3‑star* certification reduces harmful blue light while preserving stunning color quality without compromise. *TÜV Rheinland 3-star eye comfort certification.
- Wide viewing angle: Get consistent views across a wide 178° /178° viewing angle.
- In-Plane Switching (IPS): See excellent color accuracy and consistency across wide viewing angles with In-plane Switching (IPS) technology.
- Ultra-thin bezels: Maximize your viewing experience with thin bezels.
Handle targets with different scrape intervals
If targets behind a data source use different scrape cadences, Grafana advises setting the data-source interval to the longest interval in use, or overriding the Min step for panels that need a different value. The choice depends on the targets and queries involved:
- Use the longest cadence at the data-source level when one shared setting must safely account for targets scraped at different intervals.
- Set a per-query Min step when a particular panel needs an explicit interval appropriate to its target or query.
Keep recording rules separate from dashboard intervals
Grafana cautions that $__rate_interval depends on evaluation context and recommends a fixed range for recording-rule queries. A dashboard panel can use the Grafana variable for its rate window; a recording rule should use an intentionally chosen, fixed interval instead.
Rank #4
- CURVED FOR ENHANCED ENGAGEMENT: An immersive viewing experience with a curved monitor that wraps more closely around your field of vision; It creates a wider view, enhancing depth perception and minimizing peripheral distraction
- SMOOTH PERFORMANCE FOR SEAMLESS CONTENT: Stay in the action when playing games, watching videos, or working on creative projects; The 100Hz refresh rate reduces lag and motion blur so you don't miss a thing in fast-paced moments¹
- MORE GAMING POWER: Gain the edge with optimizable game settings; Color and image contrast can be adjusted to see scenes more vividly and spot enemies hiding in the dark; Game Mode adjusts any game to fill the screen so you can view every detail²
- KEEP IT EASY ON THE EYES: Care for your eyes and stay comfortable, even during long sessions; Advanced eye comfort technology certified by TÜV reduces eye strain by minimizing blue light and reducing irritating screen flicker²
- INCREASED VERSATILITY: Connect to more; Plug devices straight into your monitor for increased flexibility, making your computing environment even more convenient
Make the rate window visible to maintainers
Shinder reported that after correcting the data-source scrape interval to sixty seconds, the team added a dashboard-repository linter, converted alert ratios to recording rules with a fixed five-minute window, and included each panel’s rate window in its title. The author also reported that the linter found 43 more queries using the problematic pattern in that repository. These are practices and a count from that account, not general findings or independently verified outcomes.
Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problemsShowing the rate window in a panel title can help readers understand the time span behind a plotted rate. The linter can help catch future uses of a dashboard interval where a rate-specific interval is needed. Shinder’s account also says the linter rejected $__interval inside irate(); that was the team’s lint policy, not a rule established by Grafana’s cited documentation.
Quick Recap
Best Value
- 【INTEGRATED SPEAKERS】Whether you're at work or in the midst of an intense gaming session, our built-in speakers provide rich and seamless audio, all while keeping your desk clutter-free.
- 【EASY ON THE EYES】 Protect your eyes and enhance your comfort with Blue-Light Shift technology. This feature reduces harmful blue light emissions from your screen, helping to alleviate eye strain during long hours of use and promoting healthier viewing habits.
- 【WIDEN YOUR PERSPECTIVE】Our sleek minimal bezel design ensures undivided attention. The nearly bezel-free display seamlessly connects in a dual monitor arrangement, delivering an unobstructed view that lets you focus on more at once, completely distraction-free.
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.
