Why ahrefs bots work too much slowly people’s complain it

You open your server logs and see it: a wall of requests from AhrefsBot, each one hitting a different URL, and your site is crawling. Pages load slowly. CPU spikes. Visitors complain. You start to wonder why ahrefs bots work too much slowly people’s complain it — and more importantly, what you can do about it. The short answer: AhrefsBot is a crawler that respects crawl limits, but its default behavior can still overwhelm a small server or a poorly configured site. This article walks you through a diagnosis first, then the settings that actually control the bot’s pace, and finally how to tell whether the slowness is the bot’s fault or your hosting’s.

Before you touch a single setting, check the logs. The symptom is usually one of three things: slow page responses for real users, high CPU or memory usage on the server, or a flood of AhrefsBot hits that seem to repeat on the same URLs. Each points to a different root cause. Diagnosis comes before configuration. Changing crawl-delay or robots.txt without knowing what’s actually happening is like turning off the lights to fix a flickering bulb.

Start with the log file: a short diagnostic checklist

Open your raw access log and filter for the AhrefsBot user-agent. Look at the timestamps. Are requests arriving in bursts every few seconds, or are they spread out? A steady trickle is normal. A burst that coincides with your slow page loads is a clue. Next, check the response codes: are you returning 200s, or are there many 404s and 500s? A bot hitting thousands of 404s is wasting your server’s time and will keep coming back if those URLs remain in its index.

Then look at the URLs being requested. Is the bot crawling product filters, search results, or calendar pages that generate heavy database queries? Those pages are expensive to render. If AhrefsBot is hitting them repeatedly, your server feels it. Finally, note the crawl rate: how many requests per second? Compare that to your normal traffic. A small shared host can struggle with even a modest crawl if the pages are dynamic.

One quick test: temporarily block AhrefsBot with a firewall rule or a robots.txt disallow, then watch your server load for an hour. If the slowness disappears, the bot is the trigger. If it doesn’t, the problem is elsewhere — maybe a plugin, a database query, or a hosting limit. This test saves hours of guesswork.

What crawl-rate and user-agent settings actually control

AhrefsBot respects two main signals: the crawl-delay directive in robots.txt and the crawl rate setting in Ahrefs’ own dashboard. They do different things. Crawl-delay tells the bot how many seconds to wait between requests to your domain. A value of 10 means one request every 10 seconds — very polite. But not all crawlers honor crawl-delay, and AhrefsBot’s support for it has changed over time. The more reliable lever is the crawl rate setting inside Ahrefs’ Site Explorer, where you can request a slower crawl for your verified domain.

The user-agent string is how you identify the bot in logs and firewall rules. AhrefsBot sends a user-agent that includes “AhrefsBot” and a version number. You can use that to block it entirely, but that’s a blunt instrument: you lose the backlink and SEO data Ahrefs provides. A better approach is to throttle it. Some servers and CDNs let you set rate limits per user-agent, which is more precise than robots.txt.

Robots.txt options: disallow vs. crawl-delay

A robots.txt disallow tells the bot not to crawl certain paths. It does not stop the bot from requesting the disallowed URL once to see the rule — it just prevents future crawls of that path. So if you disallow /search/, the bot may still hit /search/ once, then stop. That’s fine for thin pages. But disallowing your entire site will eventually remove your pages from Ahrefs’ index, which may not be what you want.

Crawl-delay is gentler. Add a line like Crawl-delay: 10 under the User-agent: AhrefsBot section. Test it: after a day, check the logs to see if the request rate dropped. If it didn’t, the bot may be ignoring the directive, and you’ll need to use server-level rate limiting or the Ahrefs dashboard. Robots.txt is a request, not a command. Well-behaved bots follow it, but you shouldn’t rely on it as your only defense.

Using the Ahrefs dashboard to slow the crawl

If you have a verified project in Ahrefs, you can adjust the crawl rate directly. Log in, go to your project settings, and look for the crawl rate option. You can set it to a lower requests-per-second value. This is the most reliable way to reduce load because it’s enforced on Ahrefs’ side. The trade-off: slower crawling means your backlink data updates less frequently. For a small site, that’s usually acceptable. For a large e-commerce site with thousands of pages, you might prefer to keep the crawl rate moderate and instead optimize your server.

Separating bot-caused load from hosting limits

Not every slow page is the bot’s fault. A $5 shared hosting plan will buckle under a crawl of 10 requests per second if each request triggers a heavy PHP process. The bot just exposes the weakness. To tell the difference, check your server’s resource usage during the crawl. If CPU is pegged at 100% and memory is maxed out, your hosting is the bottleneck. If CPU is moderate but page response times are high, the bot might be hitting expensive pages or your database is slow.

Look at the time of day. Does the slowness only happen when AhrefsBot is active? If so, the bot is the trigger. But the underlying cause could be a lack of caching. Enable page caching, object caching, and a CDN. A cached page served to a bot takes milliseconds instead of seconds. That alone can turn a crawl from a burden into a non-event. Bots are a stress test you didn’t ask for — use them to find your weak points.

Also consider the number of concurrent connections. Some hosts limit simultaneous connections per IP. AhrefsBot may open several connections at once, hitting that limit and causing queuing for real users. A CDN or a reverse proxy can absorb those connections and serve cached content, reducing the load on your origin server.

Step-by-step: what to change first

Don’t change everything at once. Follow this order, and give each step a day to show results.

1. Check the logs for AhrefsBot request rate, response codes, and which URLs are hit most. Note the peak times.
2. Enable caching (page cache, object cache, CDN) if you haven’t already. This is the highest-impact fix for most sites.
3. Add a crawl-delay in robots.txt for AhrefsBot. Start with 10 seconds. Monitor the logs for a day.
4. Adjust the crawl rate in the Ahrefs dashboard if you have a verified project. Set it to a lower value.
5. Disallow expensive paths like search results, filters, and cart pages in robots.txt, but only if they don’t contain content you want indexed.
6. Consider rate limiting at the server or CDN level if the bot still overwhelms you. This is a last resort before blocking.

After each step, re-check the logs. If the slowness persists, move to the next step. Most sites find relief after step 2 or 3. If you reach step 6 and still have problems, your hosting is likely undersized for your traffic — bot or no bot.

When to block AhrefsBot entirely (and when not to)

Blocking the bot is a valid choice if your site is small, your hosting is weak, and you don’t use Ahrefs for SEO analysis. You can block it via robots.txt (disallow all) or via a firewall rule. But be aware: blocking AhrefsBot also means Ahrefs won’t crawl your site, so your backlink profile and site audit data in their tools will go stale. If you rely on Ahrefs for competitor research or link monitoring, blocking is counterproductive.

A middle ground: block the bot from crawling your site but allow it to fetch individual pages when you request a site audit. That’s not really possible with a simple block. The practical compromise is to throttle rather than block. Use crawl-delay and dashboard settings to keep the bot at a pace your server can handle. Throttling preserves data while protecting performance.

Also, remember that AhrefsBot is just one of many crawlers. If you block it, others (Googlebot, Bingbot, SEMrushBot) will still visit. The skills you learn tuning AhrefsBot apply to all of them. So use this as an opportunity to set up a general crawl policy: a reasonable crawl-delay for all bots, caching, and monitoring.

Frequently asked questions

Why does AhrefsBot crawl my site so slowly?

AhrefsBot is designed to be polite, but “slowly” is relative. If your server is slow to respond, the bot will appear to crawl slowly because each request takes longer. The bot itself isn’t slow; it’s waiting on your server. Check your server response times first. If they’re high, optimize your site or hosting. If they’re fine, the bot’s crawl rate might be set low in the Ahrefs dashboard, or robots.txt crawl-delay is high.

Can I stop AhrefsBot from slowing down my site?

Yes. The most effective methods are: enable caching and a CDN, set a crawl-delay in robots.txt, lower the crawl rate in the Ahrefs dashboard, and disallow expensive URLs. If those don’t work, use server-level rate limiting or block the bot entirely. Start with caching — it’s the biggest win for the least effort.

Does blocking AhrefsBot hurt my SEO?

Not directly. Google doesn’t use Ahrefs data for ranking. But blocking AhrefsBot means you lose access to Ahrefs’ backlink and site audit data for your site. If you use Ahrefs for SEO work, that’s a loss. If you don’t, blocking is harmless. Many site owners throttle instead of block to keep the data flowing without the load.

How do I know if the slowness is from AhrefsBot or my hosting?

Temporarily block AhrefsBot and monitor your server load for an hour. If the slowness goes away, the bot was the trigger. If it doesn’t, your hosting or site configuration is the root cause. Also check resource usage: high CPU with moderate bot traffic points to hosting limits; high response times with low CPU points to slow code or database queries.

Ultimately, the complaint that AhrefsBot works too slowly is usually a sign that your site’s performance needs attention. The bot is a messenger, not the message. Fix the underlying bottlenecks — caching, hosting, expensive queries — and the crawl becomes a background hum instead of a headache.