Installation guide

Table 5–1: Tunable param.c File Entries (cont.)
Parameter Default Value Configuration File
Equivalent
set_max_num 2*threadmax+200 Based on
threadmax
select_max_elements 1024+NPROC*4 None
select_chunk_elements 256 None
spechsz 64 None
sys_v_mode 0 sys_v_mode
task_max 1 + (20 + (8*maxusers)) task_max
threadmax 8192 threadmax
ucred_max 128 None
ubc_minpercent 10 ubcminpercent
ubc_maxpercent 100 ubcmaxpercent
ufs_blkpref_lookbehind 8 None
vm_max_wrpgio_kluster 32*1024 writeio_kluster
vm_max_rdpgio_kluster 16*1024 readio_kluster
5.6 Configuration File Entries
The system configuration file contains the following keyword definitions:
• Global keyword definitions
• System definition keywords
• Device definition keywords
• callout keyword definitions
• options keyword definitions
• makeoptions keyword definitions
• pseudo-device keyword definitions
Table 5–2 lists the available configuration options. The first column
specifies the configuration file keyword. The second column provides the
default value assigned to the keyword if it is not included in the
configuration file. The third column states whether you can change the
value of the keyword. The fourth column states whether the keyword is
required to be present in the configuration file.
The sections that follow the table define some of these entries.
5–32 Configuring the Kernel