Product specifications

4.5 Appendix E – Tunable Kernel Parameters

The following tunable kernel parameter should be set in /etc/sysctl.conf in order to optimize the

performance of the database.

Table 7:

Parameter

RHEL 6.5

net.ipv4.tcp_slow_start_after_idle 0

net.ipv4.conf.all.rp_filter 0

net.ipv4.ip_local_port_range 40000 61000

net.ipv4.neigh.default.gc_thresh{1,2,3} {256,1024,4096}

net.ipv6.neigh.default.gc_thresh{1,2,3} {256,1024,4096}

kernel.shmmax 137438953472*

kernel.shmall 33554432*

kernel.shmmni 65536*

kernel.msgmni 32768

kernel.sem 1250 256000 100 8192

kernel.msgmax 65536

kernel.sysrq 1

vm.swappiness 60

vm.max_map_count 2000000

vm.memory_failure_early_kill 1

fs.file-max 20000000

fs.aio-max-nr 458752

The values marked with an asterisk (*) will be calculated by the installer in accordance with the size of your

available memory. The values are then written to the sysctl.conf file.

4.6 Appendix F - Table to Calculate the Size of the Logical

Volumes

The following table shows you the storage areas that you will need in order to install SAP HANA.

The mount points are defaults which can be changed during installation. The names of the logical volumes are

only suggestions and can be changed without affecting the installation.

Red Hat Enterprise Linux (RHEL) 6.5 Configuration Guide for SAP HANA

Appendix

P U B L I C