Hi *, On Tue, Aug 9, 2011 at 8:58 PM, Terrence Enger <ten...@iseries-guru.com> wrote: > On Mon, 2011-08-08 at 11:40 +0200, Christian Lohmaier wrote: >> >> Not true either. Default ccache size is 1GB, and that is enough when >> you focus on one branch. (a build uses less than 500MB) > > Just a note about what I have observed, for anybody who > happens to care. > > > cache directory /home/terry/.ccache > cache hit (direct) 6158 > cache hit (preprocessed) 37 > cache miss 11986 > [...] > files in cache 30789 > cache size 4.1 Gbytes > max cache size 10.0 Gbytes > > This makes me really glad that I set a max cache size larger > than the default 1 GB,
So you showed some irrelevant numbers, at least for the current topic. Your cache is filled with other stuff already, not with just the files from one single build. And of course ccache will happily use whatever size is available before it starts to expire old files. But yes, If you build with debug symbols, you need larger cache size. The <500MB for a build was referring to product builds, without any debugging options. > For comparison, after I had completed several non-product > builds of OpenOffice, my cache statistics looked like ... > > cache directory > /media/2ced347d-3cdc-49f5-956d-099d36784957/terry/OOo_hacking/SRC_DIR_ccache > cache hit (direct) 0 > cache hit (preprocessed) 15499 > cache miss 14993 That is a rather bad hit ratio - something between 5:1 and 10:1 when building often would be what I expect. 1:1 is when you build versions that did have lots of changes in between. And no direct hits? Did you disable it? Norbert's ratio is of course when you build multiple times a day, so might not be that representative either :-) But you see that the cache-size doesn't need to be big to get hits. When you stay on one branch, then the files that didn't match won't match in future, so no need to keep them around, they can be expired. When you switch back and forth in history and between different branches, you should consider using different cache-directories (when you build the other branches seldomly compared to your main tree), or use a bigger size (if the other branch gets build regularly, and thus the files in the cache are touched and thus not considered candidates for expiry). > max files 100000 Any reason why you set a limit on the number of files? ciao Christian _______________________________________________ LibreOffice mailing list LibreOffice@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/libreoffice
