FSRS intervals way too high

I had a recent period with no reviews, and am starting to get back into the habit. I optimized my FSRS parameters and now new cards have 29 days on ‘Good’. It had already got a bit weird with 7-9 days for ‘Good’ but never like this

Thanks in advance.

I’ll help you understand the high intervals you’re seeing with FSRS in Anki. Let me search for relevant information about FSRS intervals in the community to provide you with a helpful response.

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FSRS Intervals Way Too High

Hi there! I understand your concern about getting unusually long intervals (29 days) for new cards after optimizing your FSRS parameters, especially after a period of inactivity.

Why this might be happening:

  1. Optimization after inactivity: When you optimize FSRS parameters after a break, the algorithm analyzes your previous review history. If you had good retention before your break, FSRS might calculate that you can handle longer intervals.

  2. How FSRS works: Unlike the traditional SM2 algorithm, FSRS uses machine learning to predict optimal intervals based on your review patterns. It’s designed to space reviews more efficiently, which often means longer intervals.

Possible solutions:

  1. Reset parameters: If you feel the intervals are unreasonably high, you can reset to the default FSRS parameters which might give more conservative intervals.

  2. Adjust your target retention: If available in your settings, you could increase your desired retention rate (e.g., from 0.9 to 0.92), which would generally result in shorter intervals.

  3. Use Hard button strategically: For new cards that you feel need more frequent review, use the Hard button which will give a shorter interval than Good.

  4. Manual rescheduling: For particularly important cards, you can manually reschedule them to appear sooner.

Remember that FSRS is designed to optimize your study efficiency - it may feel counterintuitive at first, but the algorithm is trying to schedule reviews at the optimal time before forgetting. However, if you’re just getting back into your Anki routine, you might want to be more conservative with intervals initially.

Would you like more specific guidance on adjusting your FSRS settings?

if i reset my parameters, and set retention at 0.92. How do i avoid this old reviews from affecting my next optimization?

Adjusting FSRS Parameters Without Old Review Influence

Great question! When resetting your FSRS parameters and adjusting retention, you’ll want to make sure your next optimization isn’t skewed by your previous review history. Here’s how to handle this:

Steps to reset and avoid old review influence:

  1. Reset your parameters: Go to your deck options, find the FSRS settings section, and reset to the default parameters.

  2. Adjust your desired retention: Change it from the default 0.9 to 0.92 as you mentioned. This will schedule cards more conservatively.

  3. When optimizing in the future:

    • Use a search filter during optimization to only include reviews from after your break
    • For example, when you click the “Optimize” button, you can modify the search to something like rated:60 (for reviews in the last 60 days)

Additional suggestions:

  • Wait for new data: It’s best to collect at least a few weeks of new review data before optimizing again. FSRS works best with 1000+ reviews.

  • Consider interval modifier: If you’re concerned about all intervals being too long, you could temporarily use a lower interval modifier (e.g., 0.8) until you adjust to the FSRS system.

  • Monitor your retention: Keep an eye on your actual retention rate in your statistics. If you find yourself forgetting more cards than expected, you might need to adjust further.

Remember that FSRS is adaptive, so as you collect more recent review data, future optimizations will become more accurate to your current memory performance.

Would you like more specific guidance on how to use search filters during optimization?

is the “rated:60” supposed to go in the box below the parameters?

Yes, the “rated:60” search filter would go in the search box that appears when you click the “Optimize” button in the FSRS parameters section.

When you click “Optimize FSRS parameters,” Anki shows a dialog with a search box where you can specify which cards’ review history should be used for the optimization. By default, it will use all reviews from cards using that preset, but you can modify this.

The “rated:60” filter tells Anki to only consider reviews from the last 60 days for optimization, which would exclude your older review history from before your break. You can adjust the number to match your specific situation - for example, if your break was 3 months ago, you might use “rated:30” to only include the most recent month of reviews.

This helps ensure your FSRS parameters are optimized based on your current memory performance rather than being influenced by your pre-break review patterns.

If you haven’t accumulated enough recent reviews yet, it might be better to use the default parameters for a while until you build up a more substantial review history.

Hello,

It’s a common issue that FSRS sometimes gives long intervals without an apparent reason — but in most cases, it’s actually working as intended.

In your situation, it’s likely normal for FSRS to give a 29-day interval for a “Good” rating. If you were still able to recall the card after a long period without reviewing, FSRS interprets that as strong memory retention, which justifies a longer interval.

In theory, you can trust the intervals FSRS provides. Since you’ve gone a long time without reviewing, you’re more likely to rate cards as “Good” less frequently at first. But over time, as you keep reviewing, FSRS will re-optimize the intervals based on your actual performance.


But if you genuinely feel that something is wrong, you can try resetting your FSRS settings. Keep in mind that this will completely reset your FSRS configuration, meaning it will behave like a fresh install. It will take some time and optimization for FSRS to become efficient again — so it’s not really recommended unless you’re sure there’s a bug.

If you still want to proceed:

  1. Click here to reset to the default parameters.

  1. Set the this date to today.


Let me know if that helps! :blush:

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