### Please describe the problem.

I have a large git-annex repository created using the assistant. It has thousands of files in it and is about 50GB in size.
Yesterday I added a number of new files, and I also created a new "removable drive" repository for it to sync to.

During these operations I could see a large amount of data being added to the git-annex log files.
I left my computer on overnight to finish the sync.

Today I went to check the log files but there was no useful information in them.

Looking at the source I suspect I had a single log file > 1 Megabyte in size, which caused the rotation to occur repeatedly until it rolled off the end.
However, I would have preferred if this large logfile had been kept for more than a couple of hours.

See file contents below

### What steps will reproduce the problem?

See above

### What version of git-annex are you using? On what operating system?

Debian Wheezy, git-annex version: 5.20140210~bpo70+2 from wheezy-backports

### Please provide any additional information below.

[[!format sh """
# If you can, paste a complete transcript of the problem occurring here.
# If the problem is with the git-annex assistant, paste in .git/annex/daemon.log

When I look at the log files now, I see the following:
-rw-r--r--    1 pgl users     443 Mar  5 21:48 daemon.log
-rw-r--r--    1 pgl users     443 Mar  5 21:47 daemon.log.1
-rw-r--r--    1 pgl users      81 Mar  5 01:16 daemon.log.10
-rw-r--r--    1 pgl users      69 Mar  5 07:29 daemon.log.2
-rw-r--r--    1 pgl users      81 Mar  5 01:16 daemon.log.3
-rw-r--r--    1 pgl users      81 Mar  5 01:16 daemon.log.4
-rw-r--r--    1 pgl users      81 Mar  5 01:16 daemon.log.5
-rw-r--r--    1 pgl users      81 Mar  5 01:16 daemon.log.6
-rw-r--r--    1 pgl users      81 Mar  5 01:16 daemon.log.7
-rw-r--r--    1 pgl users      81 Mar  5 01:16 daemon.log.8
-rw-r--r--    1 pgl users      81 Mar  5 01:16 daemon.log.9

Looking at some of these log files.

pgl@....:/....../.git/annex$ cat daemon.log.3
[2014-03-05 01:16:15 GMT] SanityCheckerHourly: Rotated logs due to size: 1026416
pgl@....:/....../.git/annex$ cat daemon.log.4
[2014-03-05 01:16:15 GMT] SanityCheckerHourly: Rotated logs due to size: 1026416
pgl@....:/....../.git/annex$ cat daemon.log.5
[2014-03-05 01:16:15 GMT] SanityCheckerHourly: Rotated logs due to size: 1026416
pgl@....:/....../.git/annex$ cat daemon.log.6
[2014-03-05 01:16:15 GMT] SanityCheckerHourly: Rotated logs due to size: 1026416
pgl@....:/....../.git/annex$ cat daemon.log.7
[2014-03-05 01:16:15 GMT] SanityCheckerHourly: Rotated logs due to size: 1026416
pgl@....:/....../.git/annex$ cat daemon.log.8
[2014-03-05 01:16:15 GMT] SanityCheckerHourly: Rotated logs due to size: 1026416
pgl@....:/....../.git/annex$ cat daemon.log.9
[2014-03-05 01:16:15 GMT] SanityCheckerHourly: Rotated logs due to size: 1026416

# End of transcript or log.
"""]]

> Changed log rotation to only rotate 1 log per hour max,
> unless the total size of the log files is larger than the 
> free disk space on the filesystem containing them.
> 
> This way, runaway log growth will still be contained,
> but logs will generally rotate slowly enough to give plenty of time
> to see what's in them. [[done]] --[[Joey]]