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Disable JVM stats being written to file, to prevent long (up to ~400ms) pauses.

Browse Source 
- Blog post: http://www.evanjones.ca/jvm-mmap-pause.html
    - This change prevents tools that use the stats-file (/tmp/hsperfdata) from working (like jstat)
This commit is contained in:
dev
2015-04-02 16:05:43 +00:00
parent ade93ea76d
commit 168d688fc9
3 changed files with 25 additions and 12 deletions
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13
installer/resources/portable/configs/wrapper.config
View File

@@ -18,14 +18,19 @@ wrapper.java.additional.3=-Dorg.mortbay.util.FileResource.checkAliases=false
wrapper.java.additional.4=-Dorg.mortbay.xml.XmlParser.NotValidating=true wrapper.java.additional.4=-Dorg.mortbay.xml.XmlParser.NotValidating=true
wrapper.java.additional.5=-Di2p.dir.base=. wrapper.java.additional.5=-Di2p.dir.base=.
wrapper.java.additional.5.stripquotes=TRUE wrapper.java.additional.5.stripquotes=TRUE
# Prevent the JVM from exporting stats (and thereby causing hundreds of
# ms long pauses during GC)
wrapper.java.additional.6=-XX:+PerfDisableSharedMem
# PORTABLE installation: # PORTABLE installation:
# uncomment the following # uncomment the following
wrapper.java.additional.6=-Di2p.dir.pid=logs wrapper.java.additional.7=-Di2p.dir.pid=logs
wrapper.java.additional.6.stripquotes=TRUE
wrapper.java.additional.7=-Di2p.dir.temp=tmp
wrapper.java.additional.7.stripquotes=TRUE wrapper.java.additional.7.stripquotes=TRUE
wrapper.java.additional.8=-Di2p.dir.config=. wrapper.java.additional.8=-Di2p.dir.temp=tmp
wrapper.java.additional.8.stripquotes=TRUE wrapper.java.additional.8.stripquotes=TRUE
wrapper.java.additional.9=-Di2p.dir.config=.
wrapper.java.additional.9.stripquotes=TRUE
# Uncomment this for better performance. # Uncomment this for better performance.
# If it doesn't work, server mode is not available in your JVM. # If it doesn't work, server mode is not available in your JVM.

4
installer/resources/small/wrapper.config
View File

@@ -59,6 +59,10 @@ wrapper.java.additional.2=-Dorg.mortbay.http.Version.paranoid=true
wrapper.java.additional.3=-Dorg.mortbay.util.FileResource.checkAliases=false wrapper.java.additional.3=-Dorg.mortbay.util.FileResource.checkAliases=false
wrapper.java.additional.4=-Dorg.mortbay.xml.XmlParser.NotValidating=true wrapper.java.additional.4=-Dorg.mortbay.xml.XmlParser.NotValidating=true
# Prevent the JVM from exporting stats (and thereby causing hundreds of
# ms long pauses during GC)
wrapper.java.additional.5=-XX:+PerfDisableSharedMem
# Initial Java Heap Size (in MB) # Initial Java Heap Size (in MB)
#wrapper.java.initmemory=4 #wrapper.java.initmemory=4

18
installer/resources/wrapper.config
View File

@@ -79,29 +79,33 @@ wrapper.java.additional.3=-Dorg.mortbay.xml.XmlParser.NotValidating=true
wrapper.java.additional.4=-Di2p.dir.base="$INSTALL_PATH" wrapper.java.additional.4=-Di2p.dir.base="$INSTALL_PATH"
wrapper.java.additional.4.stripquotes=TRUE wrapper.java.additional.4.stripquotes=TRUE
# Prevent the JVM from exporting stats (and thereby causing hundreds of
# ms long pauses during GC)
wrapper.java.additional.5=-XX:+PerfDisableSharedMem
# On some IPv6 enabled systems, I2P and other network-enabled java applications # On some IPv6 enabled systems, I2P and other network-enabled java applications
# may fail to start. For examples see # may fail to start. For examples see
# http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=560044. # http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=560044.
# Two things that may help if you experience this issue # Two things that may help if you experience this issue
# 1) "echo 0 > /proc/sys/net/ipv6/bindv6only" as root; or # 1) "echo 0 > /proc/sys/net/ipv6/bindv6only" as root; or
# 2) uncomment the next two lines: # 2) uncomment the next two lines:
#wrapper.java.additional.5=-Djava.net.preferIPv4Stack=true #wrapper.java.additional.6=-Djava.net.preferIPv4Stack=true
#wrapper.java.additional.6=-Djava.net.preferIPv6Addresses=false #wrapper.java.additional.7=-Djava.net.preferIPv6Addresses=false
# Jetty says this is a security risk # Jetty says this is a security risk
# Uncommenting this won't help as the router forces it to true # Uncommenting this won't help as the router forces it to true
# If you really need this, you have to set it in jetty.xml # If you really need this, you have to set it in jetty.xml
# somehow - not sure exactly but here's a clue: # somehow - not sure exactly but here's a clue:
# org.mortbay.util.FileResource.setCheckAliases(false) # org.mortbay.util.FileResource.setCheckAliases(false)
# wrapper.java.additional.7=-Dorg.mortbay.util.FileResource.checkAliases=false # wrapper.java.additional.8=-Dorg.mortbay.util.FileResource.checkAliases=false
# PORTABLE installation: # PORTABLE installation:
# uncomment the following # uncomment the following
#wrapper.java.additional.7=-Di2p.dir.pid="$INSTALL_PATH" #wrapper.java.additional.8=-Di2p.dir.pid="$INSTALL_PATH"
#wrapper.java.additional.7.stripquotes=TRUE
#wrapper.java.additional.8=-Di2p.dir.temp="$INSTALL_PATH"
#wrapper.java.additional.8.stripquotes=TRUE #wrapper.java.additional.8.stripquotes=TRUE
#wrapper.java.additional.9=-Di2p.dir.config="$INSTALL_PATH" #wrapper.java.additional.9=-Di2p.dir.temp="$INSTALL_PATH"
#wrapper.java.additional.9.stripquotes=TRUE #wrapper.java.additional.9.stripquotes=TRUE
#wrapper.java.additional.10=-Di2p.dir.config="$INSTALL_PATH"
#wrapper.java.additional.10.stripquotes=TRUE
# #
# Uncomment this for better performance. # Uncomment this for better performance.
# If it doesn't work, server mode is not available in your JVM. # If it doesn't work, server mode is not available in your JVM.