Describe WHY the file/buffer cache are used.

diff --git a/doc/wl-ja.texi b/doc/wl-ja.texi
index ae559a1..fc94eee 100644 (file)
--- a/doc/wl-ja.texi
+++ b/doc/wl-ja.texi
@@ -2623,7 +2623,8 @@ expire \e$B$NBP>]$+$i=|30$5$l$^$9!#\e(B@xref{Expire and Archive}.
 
 @subsection \e$B%a%C%;!<%8$NFI$_?J$a$+$?\e(B
 
-\e$B4pK\E*$K%9%Z!<%9%-!<$r2!$9$@$1$GFI$_?J$a$k$3$H$,$G$-$^$9!#\e(B
+\e$B%5%^%j%b!<%I$G$O!"4pK\E*$K%9%Z!<%9%-!<$r2!$9$@$1$G%a%C%;!<%8$r\e(B
+\e$BFI$_?J$a$k$3$H$,$G$-$^$9!#\e(B
 \e$B%5%^%j$NI=<(FbMF$r%U%)%k%@$N:G?7$N>uBV$K9g$o$;$k\e(B(\e$BF14|$9$k\e(B)\e$B$K$O!"\e(B
 @kbd{s} \e$B$r2!$7$^$9!#\e(B
 
@@ -2682,15 +2683,16 @@ prefix argument \e$B$D$-$G\e(B @kbd{/} \e$B$r2!$9$H!"A4$F$N;R%9%l%C%I$r3+$-$^$9!#\e(
 
 @subsection \e$B%-%c%C%7%e%U%!%$%k\e(B
 
-\e$B%M%C%H%o!<%/7PM3$N%a%C%;!<%8$O%-%c%C%7%e$5$l$^$9!#%-%c%C%7%e$O!"%G%#%l%/\e(B
+\e$B%M%C%H%o!<%/7PM3$N%a%C%;!<%8$O%-%c%C%7%e$5$l$^$9!#$3$l$K$h$j!"%M%C%H%o!<%/\e(B
+\e$BN.NL$,@aLs$5$l!"$^$?%*%U%i%$%sA`:n$,2DG=$H$J$j$^$9!#%-%c%C%7%e$O!"%G%#%l%/\e(B
 \e$B%H%j\e(B @file{~/.elmo/cache} \e$B$KJ];}$5$l$^$9!#%-%c%C%7%e$r%/%j%"$9$k$K$O!"\e(B
 @kbd{M-x elmo-cache-expire-by-size} \e$B$HF~NO$7$F$/$@$5$$!#:G6a;H$o$l$F$J$$\e(B
 \e$B%-%c%C%7%e$+$i=g$K!"0lDj$N%G%#%9%/MFNL$K$J$k$^$G>C$7$^$9!#\e(B
 
 @subsection \e$B%P%C%U%!%-%c%C%7%e$H@hFI$_5!G=\e(B
 
-\e$B0lEYFI$s$@%a%C%;!<%8$O0lDj?t%P%C%U%!$KJ];}$5$l$^$9!#\e(B
-\e$BJ];}$9$k%P%C%U%!$N?t$O\e(B 
+\e$B0lEYFI$s$@%a%C%;!<%8$O0lDj?t%P%C%U%!$KJ];}$5$l$^$9!#$3$l$K$h$j!"<!$K$=$N\e(B
+\e$B%a%C%;!<%8$rI=<($9$k:]$NF0:n$r9bB.$K$7$^$9!#J];}$9$k%P%C%U%!$N?t$O\e(B
 @code{wl-message-buffer-cache-size} \e$B$G;XDj$7$^$9!#\e(B
 
 \e$B$^$?!"%a%C%;!<%8$rFI$s$G$$$k4V$K<!$N%a%C%;!<%8$r<hF@$7$F$*$/@hFI$_5!G=$,\e(B

diff --git a/doc/wl.texi b/doc/wl.texi
index 637e51b..c40588e 100644 (file)
--- a/doc/wl.texi
+++ b/doc/wl.texi
@@ -2695,14 +2695,16 @@ message then you have the reconstructed thread.
 @subsection Cache File
 
 The messages which have to access via network (e.x. IMAP, NNTP folder)
-are cached as a local file.  The cache file is saved under the directory
+are cached as a local file so as to save network traffic or to enable
+off-line operation.  The cache file is saved under the directory
 @file{~/.elmo/cache}.  To expire cache, type @kbd{M-x
 elmo-cache-expire-by-size}.  The command deletes cache files to the
 specified size by the order of last accessed time.
 
 @subsection Buffer Cache and Prefetching
 
-The messages that are read are kept in the cache buffer.  It is called
+The messages that are read are kept in the cache buffer so as to make
+the behavior fast when you are to read the message again.  It is called
 `buffer cache'. The number of cache buffer is specified by
 @code{wl-message-buffer-cache-size}.