Hi,
Can anyone recommend some very usefull settings for a high performance
kernel on 5.4? There doesn't seem to be a LINT config anymore in CVS, so I
dont know what all my options are.
We have a quad CPU system with 4GB of RAM Nevermind what we throw at the
system, it never seems to do any actual work I'm not sure whether this
is because we already have a very good optimised system, or whether our test
clients are unable to cope I believe that there may be a couple of
issues with the high amount of resources we have. The 4GB of RAM seems to
be a issue (we can't get MySQL to even manage to use 2GB of it), and from
what we can see, multiple processors aren't used either
I'm also after settings / options for MAXDSIZ and MAXSSIZE, google has
returned nothing... I've seen allot of archived posts refering to this, but
as far as a actual configuration with those options go, nudda...
Our kernconf at the moment:
# DB02 - Optimised Kernel for Max Performance.
# cknipe - 2005/04/25
machine i386
cpu I686_CPU
ident DB02
maxusers512
options NMBCLUSTERS=65536 # maxusers and NMBCLUSTERS are both
very important settings
options SCHED_4BSD # 4BSD scheduler
options INET# InterNETworking
options FFS # Berkeley Fast Filesystem
options SOFTUPDATES # Enable FFS soft updates support
options UFS_ACL # Support for access control lists
options UFS_DIRHASH # Improve performance on big
directories
options MD_ROOT # MD is a potential root device
options PROCFS # Process filesystem
options PSEUDOFS# Pseudo-filesystem framework
options GEOM_GPT# GUID Partition Tables
options COMPAT_43 # Compatible with BSD 4.3 [KEEP
THIS!]
options COMPAT_FREEBSD4 # Compatible with FreeBSD4
options SCSI_DELAY=5000 # Delay (in ms) before probing SCSI
options KTRACE # ktrace(1) support
options SMP # Multi Processor System
# System V semaphores and tunable parameters
options SYSVSEM # SYSV-style semaphores
options SEMMAP=8192 # Amount of entries in semaphore map
options SEMMNI=1024 # Number of semaphore identifiers in
the system
options SEMMNS=8192 # Number of semaphores in the system
options SEMMNU=16384# Number of undo structures in the
system
options SEMMSL=255 # Max number of semaphores per id
options SEMOPM=401 # Max number of operations per semop
call
options SEMUME=201 # Max number of undo entries per
process
# System V shared memory and tunable parameters
options SYSVSHM # SYSV-style shared memory
options SHMMAXPGS=4097 # Max amount of shared memory pages
(4k on i386)
options SHMALL=4097 # Max amount of shared memory
(bytes)
options SHMMAX=(SHMMAXPGS*PAGE_SIZE+1) # Max shared memory segment
size (bytes)
options SHMSEG=57 # Max shared memory segments per
process
options SHMMNI=1024 # Max number of shared memory
identifiers
# System V message queues and tunable parameters
options SYSVMSG # SYSV-style message queues
options MSGMNB=4097 # Max characters per message queue
options MSGMNI=81 # Max number of message queue
identifiers
options MSGSEG=4097 # Max number of message segments in
the system
options MSGSSZ=32 # Size of a message segment MUST be
power of 2
options MSGTQL=81 # Max amount of messages in the
system
options _KPOSIX_PRIORITY_SCHEDULING
options KBD_INSTALL_CDEV# install a CDEV entry in /dev
options AHC_REG_PRETTY_PRINT# Print register bitfields in debug
# output. Adds ~128k to driver.
options AHD_REG_PRETTY_PRINT# Print register bitfields in debug
# output. Adds ~215k to driver.
options ADAPTIVE_GIANT # Giant mutex is adaptive.
device apic# I/O APIC
# Bus support. Do not remove isa, even if you have no isa slots
device isa
device eisa
device pci
# Floppy drives
device fdc
# ATA and ATAPI devices
device ata
device atadisk # ATA disk drives
device ataraid # ATA RAID drives
options ATA_STATIC_ID # Static device numbering
# SCSI peripherals
device scbus # SCSI bus (required for SCSI)
device da # Direct
