Re: Bad performance with near-full FS

2015-06-16 Thread Tovo Rabemanantsoa
On 06/15/2015 05:37 PM, Austin S Hemmelgarn wrote: For almost any non-COW filesystem (ext4, XFS, JFS, etc.), 1% or 100MB (whichever is larger) is generally a good buffer. On BTRFS, I would say at least 5% or 1.5G (again, whichever is larger; and if performance is a concern, go for at least

Re: Bad performance with near-full FS

2015-06-15 Thread David Sterba
On Mon, Jun 15, 2015 at 02:47:24PM +0200, Tovo Rabemanantsoa wrote: Hi all, By browsing this list's archive, I've found a thread initiated by Charles Cazabon entitled: Oddly slow read performance with near-full largish FS. Actually, I'm living the same experience but with a not so large FS

Bad performance with near-full FS

2015-06-15 Thread Tovo Rabemanantsoa
Hi all, By browsing this list's archive, I've found a thread initiated by Charles Cazabon entitled: Oddly slow read performance with near-full largish FS. Actually, I'm living the same experience but with a not so large FS (256GB on a SSD). Indeed, when I have less than 1GB of free space, the

Re: Bad performance with near-full FS

2015-06-15 Thread Clemens Eisserer
Hi, Thanks for you reply, If I really understand, it's always a good idea to keep more than 1% of free space. Right ? Usually the rule of thumb is 10-20%. Br, Clemens -- To unsubscribe from this list: send the line unsubscribe linux-btrfs in the body of a message to

Re: Bad performance with near-full FS

2015-06-15 Thread Austin S Hemmelgarn
On 2015-06-15 10:44, Tovo Rabemanantsoa wrote: On 06/15/2015 03:29 PM, David Sterba wrote: On Mon, Jun 15, 2015 at 02:47:24PM +0200, Tovo Rabemanantsoa wrote: Hi all, By browsing this list's archive, I've found a thread initiated by Charles Cazabon entitled: Oddly slow read performance with

Re: Bad performance with near-full FS

2015-06-15 Thread Tovo Rabemanantsoa
On 06/15/2015 03:29 PM, David Sterba wrote: On Mon, Jun 15, 2015 at 02:47:24PM +0200, Tovo Rabemanantsoa wrote: Hi all, By browsing this list's archive, I've found a thread initiated by Charles Cazabon entitled: Oddly slow read performance with near-full largish FS. Actually, I'm living the