> Maybe somebodyelse on the list has more knowlegde
> here
FTR, I may have solved the problem. We'll see when
the traffic peaks tomorrow. I found some kernel
advice related to IPC and big databases on the FreeBSD
4+ OS:
options MAXDSIZ="(1024*1024*1024)"
options DFLDSIZ="(1024*1024*1024)" # System V
options needed.
options SYSVSHM #SYSV-style shared memory
options SHMMAXPGS=262144 #max amount of shared
mem. pages
options SHMMNI=256 #max number of shared memory
ident if.
options SHMSEG=100 #max shared mem.segs per
process
options SYSVMSG #SYSV-style message queues
options MSGSEG=32767 #max num. of mes.segments in
system
options MSGSSZ=32 #size of msg-seg. MUST be power
of 2
options MSGMNB=65535 #max char. per message queue
options MSGTQL=2046 #max amount of msgs in system
options SYSVSEM #SYSV-style semaphores
options SEMMNU=256 #number of semaphore UNDO
structures
options SEMMNS=1024 #number of semaphores in
system
options SEMMNI=520 #number of semaphore
indentifiers
options SEMUME=100 #number of UNDO keys
These are the semaphore related kernel options (from
LINT):
# System V semaphores and tunable parameters
options SYSVSEM # include support for
semaphores
options SEMMAP=31 # amount of entries in
semaphore map
options SEMMNI=11 # number of semaphore
identifiers in the system
options SEMMNS=61 # number of semaphores
in the system
options SEMMNU=31 # number of undo
structures in the system
options SEMMSL=61 # max number of
semaphores per id
options SEMOPM=101 # max number of
operations per semop call
options SEMUME=11 # max number of undo
entries per process
I still have not raised my NSem setting since I
neglected to put this into the kernel as well:
options SEMMSL=64
which I believe is what I need to do in order to allow
NSems to be anything more than 16. Even so, it seems
to be a lot faster.
Also, I wonder if, since the apache processes can grow
much larger, if these:
options MAXDSIZ="(1024*1024*1024)"
options DFLDSIZ="(1024*1024*1024)"
might fall under highly recommended as FreeBSD will,
by default, cap processes at 128M. I know that's
huge, but so is 40M and I imagine you can get there.
Anyway, thanks again for the attention you gave this
one.
Regards,
-Jarrod
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