要清除phpMyAdmin中的緩存，需分別處理瀏覽器、MySQL服務(wù)器和phpMyAdmin自身緩存：1. 清除瀏覽器緩存并執(zhí)行硬刷新（Ctrl Shift R或Cmd Shift R）；2. 在phpMyAdmin的SQL標(biāo)簽中執(zhí)行FLUSH TABLES;和FLUSH STATUS;（MySQL 8.0 不支持查詢緩存）；3. 注銷并刪除phpMyAdmin相關(guān)Cookie（如pma_user_config、phpMyAdmin等）后重新登錄；4. 若有權(quán)限，重啟MySQL服務(wù)（如sudo systemctl restart mysql）以徹底清除服務(wù)器緩存。綜合以上步驟可有效解決大多數(shù)緩存問題。

Clearing cache in phpMyAdmin isn't done directly through the phpMyAdmin interface, since it doesn't have a built-in "clear cache" button. However, the "cache" you're likely dealing with comes from either your browser, MySQL server, or phpMyAdmin's internal mechanisms (like query caching or table information caching). Here’s how to handle each:

1. Clear Browser Cache

Since phpMyAdmin is web-based, your browser may cache outdated views or login sessions.

Steps:

• Press Ctrl Shift Delete (Windows) or Cmd Shift Delete (Mac)
• Select time range: "All time" or "Everything"
• Check boxes for Cached images and files
• Click "Clear data"

Alternatively, do a hard refresh:

• Ctrl F5 or Ctrl Shift R (Windows/Linux)
• Cmd Shift R (Mac)

This ensures you're seeing the latest version of phpMyAdmin and database changes.

2. Flush MySQL Server Cache

If you're seeing stale query results or metadata, the MySQL server might be caching data.

You can run these SQL commands in phpMyAdmin’s SQL tab:

-- Clear query cache (if query cache is enabled)
FLUSH QUERY CACHE;

-- Remove all query cache memory allocation
RESET QUERY CACHE;

-- Flush tables and close open handlers
FLUSH TABLES;

-- Refresh host cache (helps if DNS/connection issues)
FLUSH HOSTS;

-- Clear status variables (optional)
FLUSH STATUS;

?? Note: In MySQL 8.0 , the query cache is removed, so FLUSH QUERY CACHE won’t work. Instead, focus on metadata and table caches.

For table and metadata cache:

FLUSH TABLES;
FLUSH TABLE_STATISTICS;
FLUSH STATUS;

3. Clear phpMyAdmin’s Internal Metadata Cache

phpMyAdmin sometimes caches table structures or relations, especially if you’ve renamed or altered tables.

Solution:

• Log out of phpMyAdmin
• Delete the phpmyadmin cookies in your browser (look for pma_user_config, pma_lang, phpMyAdmin)
• Log back in

Alternatively, if you're using phpMyAdmin configuration storage (for bookmarks, saved queries, etc.), you can:

• Go to the Operations tab of any database
• Look for “phpMyAdmin configuration storage” section
• Click Clear on stored queries or bookmarks if needed

4. Restart Services (if you have server access)

If you're on a local or private server (like XAMPP, WAMP, or Linux with Apache/MySQL):

# On Linux (if using systemd)
sudo systemctl restart mysql
# or
sudo systemctl restart mariadb

# Optionally restart Apache too
sudo systemctl restart apache2

This clears most server-level caches and resets connections.

Summary

To effectively "clear cache" in phpMyAdmin:

• ? Clear your browser cache and cookies
• ? Run FLUSH TABLES; and FLUSH STATUS; in the SQL tab
• ? Use hard refresh to reload the interface
• ? Restart MySQL if changes aren’t reflecting

It’s not a single button, but combining these steps usually resolves caching issues.

Basically, most of the time, it's either the browser or MySQL server holding onto old data — so tackle both.

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