General mechanism for ensuring a dodgy SFTP server can't return

[PuTTY.git] / doc / config.but

diff --git a/doc/config.but b/doc/config.but
index d24aaf1777b0c30077c82da4151be94a16ca80c7..07c35289b4e1600adc8ced2df236665ca4e228b2 100644 (file)
--- a/doc/config.but
+++ b/doc/config.but
@@ -206,6 +206,22 @@ Finally (the default option), you might not want to have any
 automatic behaviour, but to ask the user every time the problem
 comes up.
 
 automatic behaviour, but to ask the user every time the problem
 comes up.
 

+\S{config-logflush} \q{Flush log file frequently}
+
+\cfg{winhelp-topic}{logging.flush}
+
+This option allows you to control how frequently logged data is
+flushed to disc. By default, PuTTY will flush data as soon as it is
+displayed, so that if you view the log file while a session is still
+open, it will be up to date; and if the client system crashes, there's
+a greater chance that the data will be preserved.
+
+However, this can incur a performance penalty. If PuTTY is running
+slowly with logging enabled, you could try unchecking this option. Be
+warned that the log file may not always be up to date as a result
+(although it will of course be flushed when it is closed, for instance
+at the end of a session).
+

 \S{config-logssh} Options specific to SSH packet logging
 
 These options only apply if SSH packet data is being logged.
 \S{config-logssh} Options specific to SSH packet logging
 
 These options only apply if SSH packet data is being logged.