diff options
Diffstat (limited to 'net/netfilter/ipvs/Kconfig')
| -rw-r--r-- | net/netfilter/ipvs/Kconfig | 27 |
1 files changed, 14 insertions, 13 deletions
diff --git a/net/netfilter/ipvs/Kconfig b/net/netfilter/ipvs/Kconfig index 271da8447b29..2a3017b9c001 100644 --- a/net/netfilter/ipvs/Kconfig +++ b/net/netfilter/ipvs/Kconfig @@ -44,7 +44,8 @@ config IP_VS_DEBUG config IP_VS_TAB_BITS int "IPVS connection table size (the Nth power of 2)" - range 8 20 + range 8 20 if !64BIT + range 8 27 if 64BIT default 12 help The IPVS connection hash table uses the chaining scheme to handle @@ -54,24 +55,24 @@ config IP_VS_TAB_BITS Note the table size must be power of 2. The table size will be the value of 2 to the your input number power. The number to choose is - from 8 to 20, the default number is 12, which means the table size - is 4096. Don't input the number too small, otherwise you will lose - performance on it. You can adapt the table size yourself, according - to your virtual server application. It is good to set the table size - not far less than the number of connections per second multiplying - average lasting time of connection in the table. For example, your - virtual server gets 200 connections per second, the connection lasts - for 200 seconds in average in the connection table, the table size - should be not far less than 200x200, it is good to set the table - size 32768 (2**15). + from 8 to 27 for 64BIT(20 otherwise), the default number is 12, + which means the table size is 4096. Don't input the number too + small, otherwise you will lose performance on it. You can adapt the + table size yourself, according to your virtual server application. + It is good to set the table size not far less than the number of + connections per second multiplying average lasting time of + connection in the table. For example, your virtual server gets 200 + connections per second, the connection lasts for 200 seconds in + average in the connection table, the table size should be not far + less than 200x200, it is good to set the table size 32768 (2**15). Another note that each connection occupies 128 bytes effectively and each hash entry uses 8 bytes, so you can estimate how much memory is needed for your box. You can overwrite this number setting conn_tab_bits module parameter - or by appending ip_vs.conn_tab_bits=? to the kernel command line - if IP VS was compiled built-in. + or by appending ip_vs.conn_tab_bits=? to the kernel command line if + IP VS was compiled built-in. comment "IPVS transport protocol load balancing support" |