Forum Content Encoding Error
 

Hello,

Today's morning one of the moderators contacted me regarding that he's not able access the forum and getting this error: Content Encoding Error. (In fact, I've received about 5,200 Database Error messages to my email)
I was able to overcome this issue by executing this query: truncate session;

I understood from a quick search in Google that this problem was caused because of gzipping the content twice.
In fact, I have the following in my .htaccess file:

Code:
# compress text, html, javascript, css, xml
AddOutputFilterByType DEFLATE text/plain
AddOutputFilterByType DEFLATE text/html
AddOutputFilterByType DEFLATE text/xml
AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE application/xml
AddOutputFilterByType DEFLATE application/xhtml+xml
AddOutputFilterByType DEFLATE application/rss+xml
AddOutputFilterByType DEFLATE application/javascript
AddOutputFilterByType DEFLATE application/x-javascript
And I have a value of 7200 in the cookies time setting in the admincp.

Now, the forum is running normally. What should I do to ensure that this will not happen again in the near future? (when the session table is full again)
Note: This forum is big and I need the gzip function and won't disable it.