Changes between Version 7 and Version 8 of jazz/Performance_Tuning

Timestamp:

May 11, 2010, 12:45:45 PM (14 years ago)

Author:

jazz

Comment:

--

jazz/Performance_Tuning

@@ -5 +5 @@
 == System Performance Tuning : Memory ==
 
- * Share Memory
+ * Share Memory - 有些程式需要用到比較多 Share Memory (共享記憶體), 如: Kerrighed ([wiki:krg_tuning 2008-03-20 (rock/rider)])
 {{{
 echo "kernel.shmall = 796917578" >> /etc/sysctl.conf
@@ -14 +14 @@
 == System Performance Tuning : File System ==
 
- * /etc/security/limits.conf - 每個程序(process)可以開啟檔案的個數(number limits of open files per process)
+ * /etc/security/limits.conf - 每個程序(process)可以開啟檔案的個數(number limits of open files per process) - 像 HDFS 的 !DataNode 就需要調整這種參數([wiki:jazz/10-02-22#Hadoop:HDFS 2010-02-22])
 {{{
 #!diff
@@ -30 +30 @@
 == I/O Performance Tuning : NFS ==
 
- * NFS Tuning - /etc/fstab
+ * NFS Tuning - /etc/fstab - 加大 NFS read/write size 可以提升檔案系統的 I/O 效率 ([wiki:krg_tuning 2008-03-20 (rock/rider)])
 {{{
 192.168.0.111:/home /home nfs rw,bg,soft,intr,rsize=262144,wsize=262144 0 4
@@ -39 +39 @@
 == Network Performance Tuning ==
 
- * TCP Tuning
+ * TCP Tuning - ([wiki:krg_tuning 2008-03-20 (LSI)])
 {{{
 echo 262144               > /proc/sys/net/core/rmem_default