itbcodedev · December 12, 2019 08:10 · Mar 4, 2018 · Mar 28, 2017 · Mar 23, 2017 · Mar 23, 2017
diff --git a/network-tweak.md b/network-tweak.md
@@ -52,4 +52,9 @@ Additional files in /etc/security/limits.d/ might affect what is configured in l
   - http://docs.basho.com/riak/kv/2.2.1/using/performance/#optional-i-o-settings
   - http://docs.basho.com/riak/kv/2.2.1/using/performance/open-files-limit/#enable-pam-based-limits-for-centos-and-red-hat
   - http://docs.basho.com/riak/kv/2.2.1/using/performance/amazon-web-services/
-  - http://docs.basho.com/riak/kv/2.2.1/using/performance/erlang/
+  - http://docs.basho.com/riak/kv/2.2.1/using/performance/erlang/
+
+### Talks
+
+  - https://youtu.be/TneLO5TdW_M
+  - https://www.slideshare.net/iXsystems/rick-reed-600-m-unsuspecting-freebsd-users
diff --git a/network-tweak.md b/network-tweak.md
@@ -45,4 +45,11 @@ Additional files in /etc/security/limits.d/ might affect what is configured in l
 
   [2] - https://wwwx.cs.unc.edu/~sparkst/howto/network_tuning.php
 
-  [3] - http://stackoverflow.com/questions/11342167/how-to-increase-ulimit-on-amazon-ec2-instance
+  [3] - http://stackoverflow.com/questions/11342167/how-to-increase-ulimit-on-amazon-ec2-instance
+
+### More Reading
+
+  - http://docs.basho.com/riak/kv/2.2.1/using/performance/#optional-i-o-settings
+  - http://docs.basho.com/riak/kv/2.2.1/using/performance/open-files-limit/#enable-pam-based-limits-for-centos-and-red-hat
+  - http://docs.basho.com/riak/kv/2.2.1/using/performance/amazon-web-services/
+  - http://docs.basho.com/riak/kv/2.2.1/using/performance/erlang/
diff --git a/network-tweak.md b/network-tweak.md
@@ -42,5 +42,7 @@ Additional files in /etc/security/limits.d/ might affect what is configured in l
 ### References
 
   [1] - https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/5/html/Tuning_and_Optimizing_Red_Hat_Enterprise_Linux_for_Oracle_9i_and_10g_Databases/sect-Oracle_9i_and_10g_Tuning_Guide-Adjusting_Network_Settings-Changing_Network_Kernel_Settings.html
+
   [2] - https://wwwx.cs.unc.edu/~sparkst/howto/network_tuning.php
+
   [3] - http://stackoverflow.com/questions/11342167/how-to-increase-ulimit-on-amazon-ec2-instance
diff --git a/network-tweak.md b/network-tweak.md
@@ -29,7 +29,7 @@ Changing values through the ulimit command only applies to the current shell ses
     *       soft  nofile  20000
     *       hard  nofile  20000
 ```
-Save the file, log-out, log-in again and test the configuration through the ulimit -n command. Hope it helps.
+Save the file, log-out, log-in again and test the configuration through the ulimit -n command.
 
 Keep the following in mind:
 

diff --git a/network-tweak.md b/network-tweak.md
@@ -22,7 +22,25 @@
     sysctl -w net.core.wmem_max=16384
 ```
 
+Changing values through the ulimit command only applies to the current shell session, So if you want to set a new limit permanently, edit the /etc/security/limits.conf file and set your hard and soft limits. Here's an example:
+
+```
+# <domain> <type> <item>  <value>
+    *       soft  nofile  20000
+    *       hard  nofile  20000
+```
+Save the file, log-out, log-in again and test the configuration through the ulimit -n command. Hope it helps.
+
+Keep the following in mind:
+
+Soft limit: value that the kernel enforces for the corresponding resource.
+Hard limit: works as a ceiling for the soft limit.
+Additional files in /etc/security/limits.d/ might affect what is configured in limits.conf.
+
+
+
 ### References
 
   [1] - https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/5/html/Tuning_and_Optimizing_Red_Hat_Enterprise_Linux_for_Oracle_9i_and_10g_Databases/sect-Oracle_9i_and_10g_Tuning_Guide-Adjusting_Network_Settings-Changing_Network_Kernel_Settings.html
-  [2] - https://wwwx.cs.unc.edu/~sparkst/howto/network_tuning.php
+  [2] - https://wwwx.cs.unc.edu/~sparkst/howto/network_tuning.php
+  [3] - http://stackoverflow.com/questions/11342167/how-to-increase-ulimit-on-amazon-ec2-instance
diff --git a/network-tweak.md b/network-tweak.md
@@ -23,5 +23,6 @@
 ```
 
 ### References
-  [1]: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/5/html/Tuning_and_Optimizing_Red_Hat_Enterprise_Linux_for_Oracle_9i_and_10g_Databases/sect-Oracle_9i_and_10g_Tuning_Guide-Adjusting_Network_Settings-Changing_Network_Kernel_Settings.html
-  [2]: https://wwwx.cs.unc.edu/~sparkst/howto/network_tuning.php
+
+  [1] - https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/5/html/Tuning_and_Optimizing_Red_Hat_Enterprise_Linux_for_Oracle_9i_and_10g_Databases/sect-Oracle_9i_and_10g_Tuning_Guide-Adjusting_Network_Settings-Changing_Network_Kernel_Settings.html
+  [2] - https://wwwx.cs.unc.edu/~sparkst/howto/network_tuning.php
diff --git a/network-tweak.md b/network-tweak.md
@@ -0,0 +1,27 @@
+# Sample config for 2 million web socket connection
+
+```shell
+    sysctl -w fs.file-max=12000500
+    sysctl -w fs.nr_open=20000500
+    # Set the maximum number of open file descriptors
+    ulimit -n 20000000
+
+    # Set the memory size for TCP with minimum, default and maximum thresholds 
+    sysctl -w net.ipv4.tcp_mem='10000000 10000000 10000000'
+
+    # Set the receive buffer for each TCP connection with minumum, default and maximum thresholds
+    sysctl -w net.ipv4.tcp_rmem='1024 4096 16384'
+
+    # Set the TCP send buffer space with minumum, default and maximum thresholds 
+    sysctl -w net.ipv4.tcp_wmem='1024 4096 16384'
+
+    # The maximum socket receive buffer sizemem_max=16384
+    sysctl -w net.core.rmem_max=16384
+
+    # The maximum socket send buffer size
+    sysctl -w net.core.wmem_max=16384
+```
+
+### References
+  [1]: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/5/html/Tuning_and_Optimizing_Red_Hat_Enterprise_Linux_for_Oracle_9i_and_10g_Databases/sect-Oracle_9i_and_10g_Tuning_Guide-Adjusting_Network_Settings-Changing_Network_Kernel_Settings.html
+  [2]: https://wwwx.cs.unc.edu/~sparkst/howto/network_tuning.php
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