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Opera session backup absolutely trashes the hard drive
I recently noticed that my SSD has experienced much higher than expected disk write activity. I fired up some monitoring tools and found that, when Opera is running, the disk is just being hammered. Here is a screenshot of Disk Write activity over the course of a single second:
This happens (essentially) continuously.
Also, check out Disk Activity from Winodws Resource Monitor. The first screenshot is taken with Opera not running, the second while Opera is running. .
I'd file a bug report, but the bug reporting system is ill-equipped to submit issues such as this.
Update: Is it possible that most of this sits in file cache and doesn't make it to the physical disk?
Is there any particular site or some number of tabs open while this occurs, or is it independent of those factors?
Opera writes session.* files to disk each ~10 seconds. They are SQLite databases and can grow. I've had a 4 MB session.db once. You can imagine how this would affect my SSD, if it wasn't on a RAM disk.
To reduce writing onto SSD, move session.* files to a RAM disk, replacing them in the original profile with NTFS symlinks.
To reduce the file sizes if they've grown too big:
If you want to keep session content (remember which pages you have open), use the command,
sqlite3 session.db "VACUUM;"
(get sqlite3 from http://www.sqlite.org/download.html)
Or, if you don't care about sessions, just delete the files. Opera will re-create them.