UBC secondary parameters - Revision history

Kir: Reverted edits by 177.36.241.25 (talk) to last revision by Kir

2011-10-21T12:20:19Z

Reverted edits by 177.36.241.25 (talk) to last revision by Kir

177.36.241.25: /* Notes */

2011-10-21T09:11:09Z

‎Notes

Kir: simplify toc

2011-10-01T21:03:08Z

simplify toc

Nathanhaigh: /* Units */

2011-08-15T23:13:03Z

‎Units

Nathanhaigh: Indented parameters by another heading level so toc is easier to follow

2011-08-15T22:37:43Z

Indented parameters by another heading level so toc is easier to follow

Nathanhaigh: /* Units */ linked units subheading to the UBC parameter units page

2011-08-15T22:34:10Z

‎Units: linked units subheading to the UBC parameter units page

Nathanhaigh: /* privvmpages */

2011-08-01T04:57:12Z

‎privvmpages

Nathanhaigh: /* privvmpages */ specified number of bytes per page for ease of accounting on beancounter stats

2011-08-01T04:56:09Z

‎privvmpages: specified number of bytes per page for ease of accounting on beancounter stats

95.104.55.144: /* privvmpages */ Corrected possible typo.

2010-08-30T06:05:56Z

‎privvmpages: Corrected possible typo.

92.36.103.155: /* tcpsndbuf */ typo

2010-02-23T01:32:02Z

‎tcpsndbuf: typo

← Older revision		Revision as of 12:20, 21 October 2011
Line 240:		Line 240:
	allow any container cause the whole system to hang.		allow any container cause the whole system to hang.

−	~~This piece was a lifejacket that saved me from dwronnig.~~	+	== Notes ==
		+	<references/>

← Older revision		Revision as of 09:11, 21 October 2011
Line 240:		Line 240:
	allow any container cause the whole system to hang.		allow any container cause the whole system to hang.

−	~~== Notes ==~~	+	This piece was a lifejacket that saved me from dwronnig.
−	~~<references/>~~

@@ Line 4: / Line 4: @@
 to the [[UBC primary parameters|primary ones]] and can't be configured arbitrarily.
-== UBC Secondary Parameters ==
+== kmemsize ==
 Size of unswappable memory in bytes, allocated by the operating system kernel.
@@ Line 31: / Line 30: @@
 This total limit is discussed in [[UBC systemwide configuration#“Low memory”|“low memory”]].
-=== tcpsndbuf ===
+== tcpsndbuf ==
 The total size of buffers used to send data over TCP network connections.
 These socket buffers reside in [[UBC systemwide configuration#“Low memory”|“low memory”]].
@@ Line 59: / Line 58: @@
 This total limit is discussed in [[UBC systemwide configuration#“Low memory”|“low memory”]].
-=== tcprcvbuf ===
+== tcprcvbuf ==
 The total size of buffers used to temporary store the data coming from TCP network connections.
 These socket buffers also reside in [[UBC systemwide configuration#“Low memory”|“low memory”]].
@@ Line 90: / Line 89: @@
 This total limit is discussed in [[UBC systemwide configuration#“Low memory”|“low memory”]].
-=== othersockbuf ===
+== othersockbuf ==
 The total size of buffers used by local (UNIX-domain) connections between
 processes inside the system (such as connections to a local database server)
@@ Line 112: / Line 111: @@
 This total limit is discussed in [[UBC systemwide configuration#“Low memory”|“low memory”]].
-=== dgramrcvbuf ===
+== dgramrcvbuf ==
 The total size of buffers used to temporary store the incoming packets of UDP and
 other datagram protocols.
@@ Line 139: / Line 138: @@
 This total limit is discussed in [[UBC systemwide configuration#“Low memory”|“low memory”]].
-=== oomguarpages ===
+== oomguarpages ==
 The guaranteed amount of memory for the case the memory is “over-booked”
 (out-of-memory kill guarantee).
@@ Line 189: / Line 188: @@
 service and system daemons may be killed.
-=== privvmpages ===
+== privvmpages ==
 Memory allocation limit in [[Memory_page|pages]] (which are typically 4096 bytes in size).
@@ Line 231: / Line 230: @@
 There's also an article describing how [[user pages accounting]] works.
 == System-wide limits ==

@@ Line 233: / Line 233: @@
 == Units ==
+{{Main|UBC parameter units}}
 == System-wide limits ==

@@ Line 4: / Line 4: @@
 to the [[UBC primary parameters|primary ones]] and can't be configured arbitrarily.
-== kmemsize ==
+== UBC Secondary Parameters ==
 Size of unswappable memory in bytes, allocated by the operating system kernel.
@@ Line 30: / Line 31: @@
 This total limit is discussed in [[UBC systemwide configuration#“Low memory”|“low memory”]].
-== tcpsndbuf ==
+=== tcpsndbuf ===
 The total size of buffers used to send data over TCP network connections.
 These socket buffers reside in [[UBC systemwide configuration#“Low memory”|“low memory”]].
@@ Line 58: / Line 59: @@
 This total limit is discussed in [[UBC systemwide configuration#“Low memory”|“low memory”]].
-== tcprcvbuf ==
+=== tcprcvbuf ===
 The total size of buffers used to temporary store the data coming from TCP network connections.
 These socket buffers also reside in [[UBC systemwide configuration#“Low memory”|“low memory”]].
@@ Line 89: / Line 90: @@
 This total limit is discussed in [[UBC systemwide configuration#“Low memory”|“low memory”]].
-== othersockbuf ==
+=== othersockbuf ===
 The total size of buffers used by local (UNIX-domain) connections between
 processes inside the system (such as connections to a local database server)
@@ Line 111: / Line 112: @@
 This total limit is discussed in [[UBC systemwide configuration#“Low memory”|“low memory”]].
-== dgramrcvbuf ==
+=== dgramrcvbuf ===
 The total size of buffers used to temporary store the incoming packets of UDP and
 other datagram protocols.
@@ Line 138: / Line 139: @@
 This total limit is discussed in [[UBC systemwide configuration#“Low memory”|“low memory”]].
-== oomguarpages ==
+=== oomguarpages ===
 The guaranteed amount of memory for the case the memory is “over-booked”
 (out-of-memory kill guarantee).
@@ Line 188: / Line 189: @@
 service and system daemons may be killed.
-== privvmpages ==
+=== privvmpages ===
 Memory allocation limit in [[Memory_page|pages]] (which are typically 4096 bytes in size).

@@ Line 232: / Line 232: @@
 == Units ==
-<code>Oomguarpages</code> and <code>privvmpages</code>
-values are measured in [[memory page]]s.
+For full article, see: [[UBC parameter units]]
 == System-wide limits ==

@@ Line 189: / Line 189: @@
 == privvmpages ==
-Memory allocation limit in pages (which are typically 4096 bytes in size).
+Memory allocation limit in [[Memory_page|pages]] (which are typically 4096 bytes in size).
 <code>Privvmpages</code> parameter

@@ Line 219: / Line 219: @@
 This gap will be used for “high-priority” memory allocations, such
 as process stack expansion.
-Normal priority allocations will fail when the <code>barrier</code> if
+Normal priority allocations will fail when the <code>barrier</code> of
 <code>privvmpages</code> is reached.

@@ Line 50: / Line 50: @@
 performance of network communications.
-If you use rtorrent in a container, a low value for <code>tcpsndbuf</code> may cause rtorrent to take unusual among of cpu. In this case, you must put a higher value. Also watch the number of failcnt in /proc/user_beancounters.
+If you use rtorrent in a container, a low value for <code>tcpsndbuf</code> may cause rtorrent to take unusual amount of cpu. In this case, you must put a higher value. Also watch the number of failcnt in /proc/user_beancounters.
 <code>Tcpsndbuf</code> limits can't be set arbitrarily high.