From: Brewer, Edward \(NIH/OD\) (BREWERE@OD.NIH.GOV)
Date: Thu Apr 10 2003 - 15:01:50 EDT
Admins,
As a followup I checked on the maxusers value, last year we set this value
to 8192. I verified this value with sysconfig -q proc.
I have noticed that there are warnings about not setting it above 2048 or
4096.... Did we cross into the danger zone?
Also here are the values of the proc and vfs subsections
proc:
max_proc_per_user = 1024
max_threads_per_user = 4096
per_proc_stack_size = 33554432
max_per_proc_stack_size = 536870912
per_proc_data_size = 17179869184
max_per_proc_data_size = 17179869184
max_per_proc_address_space = 17179869184
per_proc_address_space = 17179869184
executable_stack = 0
autonice = 0
autonice_time = 600
autonice_penalty = 4
open_max_soft = 4096
open_max_hard = 4096
ncallout_alloc_size = 8192
round_robin_switch_rate = 0
sched_min_idle = 0
give_boost = 1
maxusers = 8192
num_wait_queues = 8192
num_timeout_hash_queues = 8192
enhanced_core_name = 0
enhanced_core_max_versions = 16
exec_disable_arg_limit = 0
dump_cores = 1
dump_setugid_cores = 0
vfs:
name_cache_hash_size = 4096
buffer_hash_size = 2048
special_vnode_alias_tbl_size = 64
bufcache = 3
bufpages = 62822
path_num_max = 64
sys_v_mode = 0
ucred_max = 256
nvnode = 82068
max_vnodes = 1209526
min_free_vnodes = 82068
vnode_age = 120
namei_cache_valid_time = 1200
max_free_file_structures = 0
max_ufs_mounts = 1000
max_nfs_mounts = 0
vnode_deallocation_enable = 1
pipe_maxbuf_size = 262144
pipe_databuf_size = 8192
pipe_max_bytes_all_pipes = 134217728
noadd_exec_access = 0
fifo_do_adaptive = 0
nlock_record = 10000
smoothsync_age = 30
io_throttle_static = 0
io_throttle_shift = 1
io_throttle_maxmzthruput = 1
revoke_tty_only = 1
strict_posix_osync = 0
pad_dirent = 0
freezefs_default_timeout = 60
follow_mkdir_symlinks = 0
TIA,
Lee Brewer
> -----Original Message-----
> From: Brewer, Edward (NIH/OD)
> Sent: Thursday, April 10, 2003 2:28 PM
> To: 'Tru64-Unix-Managers (E-mail)
> Subject: Question concerning namei cache
>
> Admins,
>
> System is a GS160 Wildfire (8 processors) Tru64 5.1a patch kit 3
>
> Currently I have been using monitor to provide me with a value for the
> buffering to the namei cache. I decided to follow the procedures in the
> System Configuration and Tuning for Tru64 5.1a. section 9.1.1 to verify.
> Following the formula I get the namei buffer at a different value than
> monitor.
>
> With monitor it is listed as 87%, by hand I get 77% (which I performed
> twice to be sure). I also did the calculation of
> ncs_goodhits/ncs_badtimehits which should be less than .1 percent...mine
> was 3.8 %. From these indications it looks like I need to do some
> exploring and tuning, What do you think?
>
> Raw Data
>
> ncs_goodhits = 76524644
> ncs_neghits = 6275430
> ncs_badhits = 202144
> ncs_falsehits = 95562
> ncs_miss = 23986482
> ncs_long = 895689
> ncs_badtimehits = 2959832
> ncs_collisions = 25643
> ncs_unequaldups = 23927
> ncs_newentry = 25093548
> ncs_newnegentry = 87703
> ncs_gnn_hit = 6204899
> ncs_gnn_miss = 5594
> ncs_gnn_badhits = 0
> ncs_gnn_collision = 32524
> ncs_pad = {
> [0] 0
>
>
> Lee Brewer
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