Documentation
Hosting, the Hub and MK Care, all in one place
How the platform is built, what each Hub tab does and how to handle the most common tasks yourself. Written for site owners and for developers.
Contents
01Getting started
How the platform is built
Every site takes the same path. The more work the edge does, the less the server has to do, and the faster the visitor gets the page.
- 1CloudflareDDoS protection, WAF rules, MK Shield blocks and edge cache for finished pages.
- 2NginxA WordPress-only web server: static files, HTML cache from disk and request limits.
- 3PHP-FPMEach site has its own PHP pool and its own system user, on the version you choose.
- 4RedisObject cache for queries: cart, checkout and admin run faster.
- 5MariaDBThe database on NVMe, offloaded by Redis.
MK Hub
The Hub does not run on the same server as your site. It runs on Cloudflare and talks to the server through our agent. That is why the Hub keeps working when a server has a problem, and why access to the server never goes over open SSH.
02Getting started
First steps
From order to a working site usually takes less than a day. Here is what happens and what you do.
- 1
Order
Pick a plan on the Hosting page. After payment the package is prepared automatically and your login details arrive by e-mail.
- 2
Log in to the Hub
Log in at mk-dizajn.hr and open your site. Every site has its own Site Hub.
- 3
Domain and Cloudflare
We connect the domain to Cloudflare. If the domain is with us, everything is already set. For .hr domains we handle the CARNET registration.
- 4
WordPress or a move
Install a new WordPress from the Hub, or send us your existing site and we move it. You get a migration estimate within one working day.
- 5
Done
Backups, cache, SSL and monitoring work from day one. The rest of this documentation is for when you want more.
03Speed
Media, AVIF and SEO
We combine proven scale with measurable SEO impact. Here’s what that looks like in practice.
Huge SEO Impact in Days: Fast Media Subdomain + CDN
Moving images to a dedicated fast subdomain (e.g. media.domain.tld) and serving them behind a CDN (e.g. Cloudflare with global cache) can transform Core Web Vitals and SEO in a matter of days. One client saw 3,000+ URLs move from “needs improvement” to “good” in Google Search Console after this change—as shown in the graph below.
Automatic next-gen images: AVIF (JPEG/PNG fallback)
When media offload is on, each new upload is converted to AVIF when conversion succeeds. Pages offer AVIF to browsers that support it (HTML picture: AVIF plus the original JPEG or PNG as fallback). Direct links to the original file still work. Theme CSS that uses background-image with the original URL still gets that original file — not AVIF. Gallery and lightbox stay one image per slot. WebP is not a format we generate for delivery; older WebP files left from previous plugins may still be served as stored.
Experience with Huge WordPress Media Libraries
We have hands-on experience running very large WordPress media libraries. We’ve operated setups where a client’s WordPress site is linked to an S3 (or S3-compatible) bucket with half a million items or more—ingestion, sync, and delivery all handled reliably. The screenshot shows one such library with 481,210 media items; we’re comfortable designing and operating at that scale.
That example is smaller than 1 TB. Cloud media space is included per plan (200 GB / 1 TB) and can be extended in 100 GB blocks — see “Storage: NVMe vs Cloud” on the hosting page.
04Speed
Cache & WordPress tools
Agency WordPress sites ship with HTML page cache, Redis object cache, and media offload with AVIF. They load automatically — you do not install them from the plugin directory. Administrators see two extra items on the WordPress toolbar (top of the screen).
MK Cache — HTML pages
Stores the public HTML of anonymous GET visits (origin disk; Cloudflare can keep a copy at the edge). Nginx can serve that HTML without running WordPress again. Publishing or updating a post, comments, and some taxonomy edits refresh the relevant pages.
What it covers
- Anonymous front-end pages (home, posts, pages, archives)
- Clear this page cache — this URL on disk and at Cloudflare (front end only)
- Clear Full cache — all origin HTML, plus Cloudflare HTML when the site is set up for it
What it does not store as the public page
- Logged-in views, wp-admin, POST, 404, search, feeds
- WooCommerce cart, checkout, account, and cart cookies
- Comment-author cookies and most query strings (tracking parameters like utm_ are ignored)
- Redis object cache — that is MK OB Cache, a different toolbar item
Toolbar
Gold/amber item labelled MK Cache. After a full clear, the item briefly shows whether Cloudflare was purged or only disk HTML was cleared.
- Clear this page cache
- Front end only. Deletes this URL’s HTML on disk and purges that URL at Cloudflare.
- Clear Full cache
- Clears all origin HTML. If Cloudflare HTML cache is configured for the site, that is purged too.
MK OB Cache — Redis objects
WordPress object cache in Redis: options, transients, and query results. This makes wp-admin and PHP faster. It is not a copy of your HTML pages.
What it covers
- Connection status (green = Redis connected, red = not)
- Hits, misses, hit ratio, and time for this request
- Clear all Cache — flush Redis for this site only
What it does not do
- Does not rebuild or delete HTML files
- Does not purge Cloudflare HTML — use MK Cache for that
Toolbar
Green item labelled MK OB Cache (red if Redis is down). Stats are for the current page load only.
- Clear all Cache
- Flushes this site’s Redis object cache, then reloads the page.
Media offload (no toolbar)
Uploads go to the media host with best-effort AVIF. Pages use a picture element when an AVIF sibling exists. There is no admin-bar control; reclaim local disk from Site Hub → WordPress → Web Terminal (media disk cleanup).
05Speed
The server
WordPress-Only Nginx Web Server
Our hosting infrastructure is built on Nginx, not Apache, and is specifically optimized for WordPress. The server is pre-configured with WordPress-specific rules and caching directives. This is a managed WordPress hosting environment running on a premium Hetzner VPS.
Multi-Version PHP-FPM
We support multiple PHP versions running simultaneously via PHP-FPM (FastCGI Process Manager). This allows you to:
- Run legacy applications on older PHP versions
- Use the latest PHP versions for modern applications
- Optimize performance with PHP-FPM's efficient process management
Supported PHP versions: 7.4, 8.0, 8.1, 8.2, 8.3, 8.4 and 8.5. Each site has its own PHP-FPM pool and version.
MK Cache (HTML)
Public HTML for anonymous visits, served from origin disk and the Cloudflare edge. Clear a page or the full cache from the WordPress toolbar.
MK OB Cache (Redis)
WordPress object cache in Redis — options, transients, and query results. Separate from HTML; flush it from the green toolbar item.
OpCache
PHP bytecode caching for faster script execution and reduced CPU usage.
Browser & CDN
Cache headers for static assets plus Cloudflare for HTML and media at the edge.
CloudFlare Protection
All hosting plans benefit from native CloudFlare integration, providing enterprise-level protection and performance:
- DDoS protection with automatic threat mitigation
- Web Application Firewall (WAF) for WordPress-specific threats
- Global CDN for faster content delivery worldwide
- SSL/TLS encryption with automatic certificate renewal
Your WordPress site sits behind CloudFlare's network, giving you enterprise-grade security without additional cost.
06MK Hub
Hub tour
Every site has its own Site Hub with the tabs below. An interactive preview with example data is on the Technology page.
| Tab | What it does |
|---|---|
| Overview | Site status, plan, PHP version and renewal date · NVMe disk and cloud media storage in use · Domains, aliases and linked subdomains · Latest backups and uptime over the last 30 days |
| MK Care | Uptime checked every minute, confirmed from the server itself · Nightly malware scan outside the site’s user, with quarantine · One-click repairs: core, plugin, new salt keys · E-mail alerts and a monthly report |
| WordPress | Open WP admin and switch the PHP version · File manager with a code editor · Web terminal with WP-CLI, locked to your site · SSH keys, Nginx and PHP logs without an SSH client |
| Performance | Share of traffic served from the edge cache · Core Web Vitals of real visitors (LCP, INP, CLS) · Traffic, requests and threats stopped · Cache purge and cache rules in one click |
| Security | Cloudflare WAF rules for WordPress, switched on for you · MK Shield: attackers found in Nginx logs are blocked at Cloudflare, with an expiry · Bot Fight Mode, wp-login and XML-RPC protection · SSL and redirect to HTTPS |
| Backups | Daily copies of files and database, off the server (Backblaze B2, EU) · Restore the whole site, only the database or only the files · Download one part of a backup through a temporary link · Daily, weekly and monthly copies, depending on the plan |
| Database | Adminer in one click, with a one-time sign-in · Database and table sizes in one place · Export the database from Adminer for your own archive · Redis object cache for faster queries |
| Aliases and forwarding to existing mailboxes · Mailboxes on the Professional and Enterprise plans · WordPress sends mail through verified SMTP · E-mail DNS records (SPF, DKIM) set up for you | |
| Staging | dev.yourdomain.com: a separate copy of the site on the same server · Refresh staging from production in one click · Try upgrades and new plugins without risk · Staging has its own database, so production stays untouched |
Open the interactive preview →WordPress SetupWordPress Files, Terminal & LogsMedia disk cleanupMK Care
07MK Hub
WordPress & staging
One WordPress per package
Each hosting package is one WordPress site with its own domain, database, backups and disk. Another domain or another WordPress site means another package.
- Aliases and subdomains: Add www or other hostnames as aliases of the same site, or serve a folder of your site as a static subdomain (up to 5). See Linked subdomains below.
- A second WordPress in a subfolder or on a subdomain: Not supported in the same package. Use a separate package, or the staging copy for tests.
- WordPress Multisite: Not part of the standard offer. If you need it, contact us and we set it up by arrangement.
Installation Options
- 1. Set up by us
- We install WordPress when your package is created, or migrate your existing site, with cache, media offload and site mail already configured. There is no control-panel installer.
- 2. By hand
- Advanced users work in Site Hub → WordPress: Web Terminal (WP-CLI, composer, git) and Files. There is no SSH or SFTP access.
- 3. Professional Installation Service
- Need help? Our Installation & Custom Work add-on service includes WordPress setup, theme installation, and initial configuration. Starting from €50/hour.
Staging Environment (dev.domain.com)
Every hosting plan includes a one-click staging environment at dev.yourdomain.com. This is a completely separate WordPress installation with its own database.
Linked subdomains (2020.domain.com)
Put a folder of your site on its own subdomain: a festival archive per year, a campaign landing page or a static export, all inside the same hosting plan, the same backup and the same disk. No second hosting plan and no extra WordPress.
How to add one
- 1
Open the panel
Site Hub → Overview → Linked subdomains.
- 2
Type the label
For example 2020. It becomes 2020.yourdomain.com.
- 3
Pick the mode
Root = the same site under another name (alias, e.g. www or shop). Directory (static) = only that folder, e.g. archive/2020. A missing folder is created for you.
- 4
Add
In about half a minute the server, the HTTPS certificate and the Cloudflare DNS record are ready.
- Directory subdomains are static: HTML, CSS, JS, images, PDF and Markdown. PHP files are never run there (they return 404).
- AI agents and tools that ask for Markdown (Accept: text/markdown) get the folder's index.md when it exists, otherwise the HTML.
- Up to 5 directory subdomains per site; root aliases do not count.
- Remove deletes the subdomain from the server and its DNS record. The files in the folder stay.
08MK Hub
Databases & Adminer
Manage your site's MySQL database in Site Hub → Database. Each site has one WordPress database; Adminer opens it with auto-login, and the Hub shows its size.
Primary WordPress database
Your live WordPress site uses one primary database and user. That pair cannot be deleted from the Hub (and primary password rotate is not offered there). Opening Adminer from the Hub for the primary database can auto-fill the MySQL login using credentials from the live site configuration.
Extra databases
Not offered in the Hub at the moment. If another app on your site needs its own database, email us and we set it up.
Adminer access
Adminer is the browser SQL UI included with hosting. Use Open Adminer in Site Hub (not a random public bookmark). Access is gated on the server; the Hub opens the correct flow for your site. Auto-login applies to the primary WordPress database only.
Optimization
The Database tab still includes optimize-now and optional scheduled OPTIMIZE/ANALYZE for the WordPress database.
09MK Hub
Files, terminal & logs
In Site Hub → WordPress you will find Files, Web Terminal, and Logs in a two-column grid with WordPress management. The file manager is limited to your site’s web root. Web Terminal opens an interactive shell in your site jail over HTTPS — no client SSH required. Logs shows recent production nginx and PHP error lines.
Files (Site Hub → WordPress)
Browse, download, upload (max 32 MB; .php and normal assets allowed), edit text files, rename, and delete individual files. Directory delete and mass-delete are blocked. Shell/binary-style extensions such as .phtml, .phar, .exe, and .sh remain refused.
Web Terminal (Site Hub → WordPress)
Interactive bash in your site chroot as the site system user. Use it for WP-CLI, composer, git, and other shell work. Sessions are ticketed over HTTPS through Cloudflare; direct SSH is not offered to clients.
Logs (Site Hub → WordPress)
View up to the last 500 lines of production nginx access, nginx error, or PHP error logs, with an on-screen text filter. Download/export is not included. Cloudflare traffic analytics and custom WAF rules are not part of this Logs panel.
10MK Hub
Media disk cleanup
After media is copied off the site, WordPress can show files as migrated while local copies still sit in wp-content/uploads/ and use your disk quota.
A background job reclaims confirmed files over time, walking the whole library in small batches so older years drain too — not only the newest uploads.
To reclaim that disk now, open Site Hub → WordPress → Web Terminal. You can preview first; nothing is deleted until you run the real cleanup.
In Web Terminal, from your site’s web root: run wp mk-b2 status to see remaining local media, then wp mk-b2 cleanup --dry-run to preview what would be removed, then wp mk-b2 cleanup to drain files that are confirmed on the media host.
11MK Hub
Cloudflare & cache rules
Site Hub → Cloudflare replaces the old Analytics tab. It has two panels: Analytics (edge traffic/performance) and Rules (WAF custom rules). Cache rules live under Site Hub → Security. All rule CRUD uses your site’s Cloudflare API token — not a shared agency token.
Analytics (Site Hub → Cloudflare)
Shows Cloudflare zone analytics for your site when the site token and zone are configured. Errors from Cloudflare are shown honestly if metrics cannot be loaded.
WAF Rules (Site Hub → Cloudflare → Rules)
List, create, edit, and delete custom WAF (firewall custom) rules for your zone. Delete asks for confirmation. Rules whose description starts with “MK ” are platform-provisioned — treat them carefully; re-provision may restore them.
Cache Rules (Site Hub → Security)
Manage Cloudflare cache rules alongside security level and cache purge. Same site token as WAF Rules. Prefer not deleting platform “MK WP HTML cache*” rules unless you intend to replace them.
Site Cloudflare API token
Analytics and rule APIs require the per-domain Cloudflare client API token stored for your site. If it is missing or rejected, the Hub shows a clear error and does not fall back to an agency-wide token. Create a Cloudflare API Token (not Global API Key) with Zone → Zone (Read), Zone → Analytics (Read), Zone → Firewall Services (Edit), and Zone → Cache Rules / Cache Settings (Edit) as needed for your plan, then attach it in the Hub domain Cloudflare settings.
12MK Hub
Backups
Backups run on their own, every day, and are kept off the server your site runs on. You restore them yourself from the Hub, without a ticket.
What is copied
The site’s files and the database. Media on Backblaze B2 already lives off the server and has its own protection.
How often
Daily on every plan. We keep 7 daily copies on Starter, 14 on Professional and 30 on Enterprise, plus 4 weekly and 3 monthly on every plan.
Where
In an encrypted repository on Backblaze B2 in the EU, separate from the server.
Restore
Site Hub → Backups: restore the whole site, only the database or only the files.
Download
Pick a part of a backup and the Hub prepares an archive and sends a temporary link. The link and the archive are deleted after 24 hours.
13MK Hub
Security & MK Shield
An attack that stops at the edge never reaches the server. That is why most protection sits on Cloudflare, and the Hub keeps it consistent for every site.
WAF rules
WordPress rules we set up (they start with “MK”) and your own, in Site Hub → Cloudflare. Do not delete our rules without a reason.
MK Shield
The agent on the server reads Nginx logs and spots attacks: wp-login brute force, XML-RPC floods, scanners. The Hub blocks that address at Cloudflare with an expiry, so the block lifts by itself.
Bot Fight Mode
Cloudflare’s protection against bad bots, switched on for you.
Isolation
Each site has its own system user and PHP pool. A problem on one site cannot read another site’s files.
14MK Care
MK Care
MK Care turns the Hub into an on-call service: someone keeps checking that the site is up and clean, and tells you when something is wrong.
It is included in the Enterprise plan. For Starter and Professional we switch it on on request. Sites without MK Care still get a check every 5 minutes (for us) and an uptime figure on Overview.
Uptime monitoring
- A check from Cloudflare every minute.
- Two failures in a row, then the agent checks the site from the server itself; only then does an incident open, with a cause.
- A Cloudflare challenge is recorded as a challenge, not as an outage.
- History: uptime for 24 hours and 30 days, a response-time chart, a 30-day bar and a list of incidents.
Security scanner
- Every night, and on “Scan now” in the Hub.
- Runs as root outside the site’s user, so an infected site cannot hide from it.
- WordPress core and plugins are compared with wordpress.org, and files with the previous scan.
- Malware signatures: PHP webshells, obfuscated eval, PHP in uploads, injected scripts in the database, unknown administrators.
Cleanup
- Automatic only when safe: infected PHP in uploads goes to quarantine, it is never deleted.
- One click: restore or remove a quarantined file, reinstall core or a plugin at the same version, new salt keys.
- For anything else there is a restore of a clean backup.
Alerts and report
- Up to five e-mail addresses, in Croatian or English.
- An alert when an incident opens and when it closes, and when the scanner finds something.
- On the first of the month: a report on uptime, incidents, backups and scans for the previous month.
15E-mail
E-mail & SMTP
~10 Forwarding Aliases as Transactional Email
We provide approximately 10 forwarding aliases (for Gmail, Yahoo, or additional email accounts via ForwardEmail) as transactional email. This option is secure and more GDPR-friendly.
You can use your domain addresses (e.g. info@yourdomain.com, mk@yourdomain.com) to send and receive from your existing inbox—no separate email hosting needed. Manage aliases and SMTP passwords in Site Hub → Email.
What's Included
We provide email via ForwardEmail for all hosting plans: domain aliases that forward to your existing inbox (Gmail, Yahoo, etc.) plus light outbound SMTP for day-to-day mail. This is not Google Workspace–class mailbox hosting.
Transactional email via ForwardEmail
Up to 5–10 forwarding aliases to your Gmail or Yahoo so you can send and receive as your domain (e.g. info@yourdomain.com). Manage aliases and generate SMTP passwords in Site Hub → Email. Learn more:
Who uses ForwardEmailPrivacy & storage (do we store emails)Send mail as Gmail (aliases)
WordPress Outgoing Email Configuration
WordPress mail (order notifications, password resets, registrations, etc.) is sent through ForwardEmail SMTP from noreply@wp.yourdomain.com. We set this up when the site is created or migrated, including the SPF and DKIM records, so no SMTP plugin is needed.
Important: WordPress email configuration with DKIM/SPF/DMARC is ONLY available if:
- Your domain is parked/purchased from us, OR
- Your domain is migrated to our Cloudflare account with orange cloud (Proxy) enabled for Cloudflare security
If your domain is not managed through us or our Cloudflare account, you can still use the SMTP/POP3 email account, but WordPress outgoing emails will need to be configured manually with your own email provider.
SMTP / IMAP client settings
- SMTP (send): host smtp.forwardemail.net — port 465 SSL/TLS (recommended) or 587 STARTTLS — username = full alias (info@yourdomain.com) — password = generated alias password from Site Hub (not your dashboard login)
- IMAP (optional receive): host imap.forwardemail.net — port 993 SSL/TLS. Storage is optional and limited on the shared provider; forwarding to your existing inbox is the default product.
- POP3 (optional): host pop3.forwardemail.net — port 995 SSL/TLS
Need More Than 100 SMTP Emails Per Day?
The 100/day limit applies only to the included SMTP (ForwardEmail) account. If you need to send more than 100 emails per day via that account (e.g., newsletters, marketing campaigns, high-volume e-commerce), use your own email service provider or a third-party WordPress plugin:
GDPR & Data Protection
ForwardEmail is fully GDPR-compliant and takes data protection seriously. All email processing is handled securely with proper data protection measures in place.
Data Processing Agreement (DPA)
ForwardEmail provides a comprehensive Data Processing Agreement that ensures:
- Full compliance with GDPR and international data protection regulations
- Secure processing of personal data
- No data retention beyond operational requirements
- Transparent data handling practices
- Your rights as a data controller are protected
By using our hosting service with ForwardEmail, you benefit from enterprise-grade email security and compliance without additional cost or complexity.
16Plans & policies
Plans & limits
Detailed comparison of what each hosting plan includes
| Feature | Starter | Professional | Enterprise |
|---|---|---|---|
| NVMe SSD Storage | 3 GB NVMe | 5 GB NVMe | 20 GB NVMe |
| Cloud storage (media) | — | 200 GB | 1 TB |
| Core Web Vitals | — | ✓ | ✓ |
| Bandwidth | Unmetered (fair use) | Unmetered (fair use) | Unmetered (fair use) |
| SSL Certificates | ✓ Free | ✓ Free | ✓ Free |
| PHP Versions | 7.4 – 8.5 | 7.4 – 8.5 | 7.4 – 8.5 |
| Caching System | MK Cache + Redis + OpCache | MK Cache + Redis + OpCache | MK Cache + Redis + OpCache |
| Backups | 7 daily · 4 weekly · 3 monthly | 14 daily · 4 weekly · 3 monthly | 30 daily · 4 weekly · 3 monthly |
| DDoS Protection | ✓ Standard | ✓ Standard | ✓ Advanced |
| MK Care | — | — | ✓ |
| Support | Priority Email | 24/7 Priority | |
| Green Energy | ✓ 100% | ✓ 100% | ✓ 100% |
| Price (per year) | €60 | €160 | €480 |
Additional Limitations
- Database size is included in the overall storage limit
- CPU and memory per site: Starter 1 vCPU and 768 MB, Professional 1.5 vCPU and 1.5 GB, Enterprise 2 vCPU and 3 GB
- Disk use (files and database) is shown in Site Hub, and a plan can be upgraded at any time
Obrt or small business? Ask us for a free first year
If you run a Croatian craft (obrt) or a small business and need a simple website, you can request our Starter hosting with the first year free. We review each request manually — no automatic checkout — and help with setup when you qualify.
See the offer for crafts & small businessesManaged WordPress hosting: the platform is on us, the content is yours.
The server, security, backups and automatic WordPress security updates are on us. You choose the plugins, the theme and the content.
What we look after
Included in every plan
- Automatic security and minor WordPress core updates
- Automatic updates for the plugins and themes you switch them on for in WordPress — the server runs them regularly
- Daily, weekly and monthly backups
- Server, PHP versions and caching: Cloudflare edge cache, Redis and OpCache
- SSL certificates with automatic renewal
- Cloudflare DDoS protection and WAF
- Uptime checks every 5 minutes; with MK Care every minute, with alerts and a nightly scan
- Hack-Fix: we clean a hacked site for free
- Automatic database optimisationComing soon
What you choose
Your site, your call
- The content and look of your site
- Which plugins and theme you use
- Updating plugins that have automatic updates switched off
- Running major WordPress upgrades when it suits you
Want someone to watch and update all plugins for you? We arrange that through the web studio.
Ask the web studio18Plans & policies
GDPR & DPA
We are committed to GDPR compliance and data protection. Below are the Data Processing Agreements (DPA) with our service providers.
Hetzner Data Processing Agreement
Our servers run at Hetzner, a European cloud provider. This DPA covers data processed through our hosting.
PDF · Updated: 9. 2. 2026.
PostHog GDPR compliance
We use PostHog for analytics, only with your consent. This document describes how PostHog processes data.
19Plans & policies
FAQ
Can I get a refund if I'm not satisfied?
Yes, we offer a 30-day money-back guarantee. If you're not satisfied with our hosting within the first 30 days, contact us for a full refund. No questions asked.
Do you offer website migration services?
Yes! Website migration is available as part of our Installation & Custom Work service. We'll handle the entire migration process from your old host to our servers. Starting from €100 depending on the complexity of your site.
What happens if I exceed my storage limit?
We'll let you know before you reach your storage limit. You can upgrade to a higher plan, move media to Cloud storage, or clean up unused files. We'll never interrupt your service without warning.
Is green energy really used?
Absolutely! Our data centers in Germany are powered by 100% renewable energy sources including wind and solar power. We're committed to reducing the environmental impact of web hosting.
Can I host non-WordPress sites?
Yes, while our hosting is optimized for WordPress, you can host any PHP-based application. Contact us for details about running custom applications or other CMS platforms.
How quickly can I get started?
Your hosting account is provisioned within minutes of payment. You'll receive your login credentials and ForwardEmail details via email, and you can start building your site immediately.
What is the difference between MK Cache and MK OB Cache?
MK Cache stores public HTML for anonymous visitors and can purge Cloudflare HTML from the gold toolbar item. MK OB Cache is Redis object cache (options, transients, queries) on the green toolbar item. Clearing one does not clear the other. See Caching & WordPress tools.
Did not find the answer?
Write to us. We answer like people do, and good questions end up in this documentation.