Changes between Version 12 and Version 13 of TipAndDoc/service/sakura/vps

Timestamp:

Sep 10, 2012 10:35:24 AM (12 years ago)

Author:

mitty

Comment:

--

TipAndDoc/service/sakura/vps

@@ -539 +539 @@
  Timing buffered disk reads:  266 MB in  3.02 seconds =  88.20 MB/sec
 }}}
+
+ = tcp-segmentation-offload =
+ * プロトコル(http/ssh)に関係なく、特定の回線からさくらVPSへのアクセスが極端に低速になる
+  * 少なくとも自宅のOCN回線からはまれに低速化した
+
+
+ * D:\>wget http://lab.mitty.jp/trac/lab/wiki/TipAndDoc/Hardware/memtest
+{{{
+--2012-09-10 10:17:15--  http://lab.mitty.jp/trac/lab/wiki/TipAndDoc/Hardware/memtest
+Resolving lab.mitty.jp... 59.106.180.123
+Connecting to lab.mitty.jp|59.106.180.123|:80... connected.
+HTTP request sent, awaiting response... 200 Ok
+Length: 34139 (33K) [text/html]
+Saving to: `memtest'
+
+15% [====>                                  ] 5,202       --.-K/s  eta 5m 1s   ^
+C
+}}}
+
+ * D:\>wget http://lab.mitty.jp/trac/lab/wiki/TipAndDoc/Hardware/memtest
+{{{
+--2012-09-10 10:18:56--  http://lab.mitty.jp/trac/lab/wiki/TipAndDoc/Hardware/memtest
+Resolving lab.mitty.jp... 59.106.180.123
+Connecting to lab.mitty.jp|59.106.180.123|:80... connected.
+HTTP request sent, awaiting response... 200 Ok
+Length: 34139 (33K) [text/html]
+Saving to: `memtest'
+
+ 6% [=>                                     ] 2,374        725B/s  eta 96s     ^
+C
+}}}
+
+ == tcp-segmentation-offload: off ==
+
+ * [http://d.hatena.ne.jp/laranjeiras/20101120/p1 TSOが原因でさくらVPSへのウェブアクセスが異常に遅くなるトラブルに遭遇 - 橙工房 Atelier Laranjeiras]
+ * [http://akibe.com/sakuravps-faq001387/ さくらのVPSで異常にアクセスが遅い時の対処方法 @AKIBE]
+
+ * $ sudo ethtool -k eth0
+{{{
+Offload parameters for eth0:
+rx-checksumming: on
+tx-checksumming: on
+scatter-gather: on
+tcp-segmentation-offload: on
+udp-fragmentation-offload: off
+generic-segmentation-offload: on
+generic-receive-offload: off
+large-receive-offload: off
+}}}
+
+ * $ sudo ethtool -K eth0 tso off
+
+ * $ sudo ethtool -k eth0
+{{{
+Offload parameters for eth0:
+rx-checksumming: on
+tx-checksumming: on
+scatter-gather: on
+tcp-segmentation-offload: off
+udp-fragmentation-offload: off
+generic-segmentation-offload: on
+generic-receive-offload: off
+large-receive-offload: off
+}}}
+
+ * D:\>wget http://lab.mitty.jp/trac/lab/wiki/TipAndDoc/Hardware/memtest
+{{{
+--2012-09-10 10:23:16--  http://lab.mitty.jp/trac/lab/wiki/TipAndDoc/Hardware/memtest
+Resolving lab.mitty.jp... 59.106.180.123
+Connecting to lab.mitty.jp|59.106.180.123|:80... connected.
+HTTP request sent, awaiting response... 200 Ok
+Length: 34139 (33K) [text/html]
+Saving to: `memtest'
+
+100%[======================================>] 34,139      --.-K/s   in 0.07s
+
+2012-09-10 10:23:16 (511 KB/s) - `memtest' saved [34139/34139]
+}}}