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Diffstat (limited to 'fetchmail-FAQ.html')
| -rw-r--r-- | fetchmail-FAQ.html | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/fetchmail-FAQ.html b/fetchmail-FAQ.html index c856386a..6ac8fd77 100644 --- a/fetchmail-FAQ.html +++ b/fetchmail-FAQ.html @@ -10,7 +10,7 @@ <table width="100%" cellpadding=0><tr> <td width="30%">Back to <a href="index.html">Fetchmail Home Page</a> <td width="30%" align=center>To <a href="/~esr/sitemap.html">Site Map</a> -<td width="30%" align=right>$Date: 2000/03/13 16:44:57 $ +<td width="30%" align=right>$Date: 2000/03/14 00:27:48 $ </table> <HR> <H1>Frequently Asked Questions About Fetchmail</H1> @@ -40,6 +40,7 @@ IP address?</a><br> <a href="#G12">G12. Is any special configuration needed to <em>send</em> mail?</a><br> <a href="#G13">G13. Is fetchmail Y2K-compliant?</a><br> <a href="#G14">G14. Is there a way in fetchmail to support disconnected IMAP mode?</a><br> +<a href="#G15">G15. How will fetchmail perform under heavy loads?</a><br> <h1>Build-time problems:</h1> @@ -617,6 +618,26 @@ gateway between POP3/IMAP servers and SMTP. Disconnected operation requires an elaborate interactive client. It's a very different problem.<p> <hr> +<h2><a name="G15">G15. How will fetchmail perform under heavy loads?</a></h2> + +Fetchmail streams message bodies line-by-line; the most core it +ever requires per message is enough memory to hold the RFC822 header, and +that storage is freed when body processing begins. It is, accordingly, +quite economical in its use of memory.<p> + +After startup time, a fetchmail running in daemon mode stats its +configuration file once per poll cycle to see whether it has changed +and should be rescanned. Other than that, a fetchmail in normal +operation doesn't touch the disk at all; that job is left up to the +MTA or MDA the fetchmail talks to.<p> + +Fetchmail's performance is usually bottlenecked by latency on the POP +server or (less often) on the TCP/IP link to the server. This is not +a problem readily solved by tuning fetchmail, or even by buying more +TCP/IP capacity (which tends to improve bandwidth but not necessarily +latency).<p> + +<hr> <h2><a name="B1">B1. Lex bombs out while building the fetchmail lexer.</a></h2> In the immortal words of Alan Cox the last time this came up: ``Take @@ -2747,7 +2768,7 @@ terminate it.<p> <table width="100%" cellpadding=0><tr> <td width="30%">Back to <a href="index.html">Fetchmail Home Page</a> <td width="30%" align=center>To <a href="/~esr/sitemap.html">Site Map</a> -<td width="30%" align=right>$Date: 2000/03/13 16:44:57 $ +<td width="30%" align=right>$Date: 2000/03/14 00:27:48 $ </table> <P><ADDRESS>Eric S. Raymond <A HREF="mailto:esr@thyrsus.com"><esr@snark.thyrsus.com></A></ADDRESS> |