Task table is full (Again)

From: Juergen Bock <bock_at_dbf.ddb.de>
Date: Tue, 8 Jul 1997 13:27:13 +0200

Hi there,

here is a pretty new one. I know this has been covered quite a few
times but I didn't find the solution yet.
The problem is the following:
As you might see from the subject of this mail we receive bazillions
of "task table is full" messages from syslog. Sometimes I see "fork:
Operation would block" when I try to execute a program.
So I assume there must be a parameter I misconfigured. But which
one??? It looks like 267 (which is max-proc-per-user) plus some
defunct is the limit for all processes. As far as I understand
max-proc-per-user is supposed to be the limit for a single user, not
for all together. Am I wrong? If yes, how can I increase the number
of tasks?

So if you have any idea what it is please let me know. Of course I
will summarize.

TIA
Juergen

Here is our setup:
-Alpha 2100/275, 256 MB, 1GB swap, DU 3.2c

I didn't configure max-proc-per-user and max-threads-per-user in to
the kernel. It gets loaded via /etc/sysconfigtab. This is what it
looks like:
rt:
 aio-max-num=1024
proc:
 max-proc-per-user=512
 max-threads-per-user=8192

I chose these proc-values to make sure they are the highest I can
get. When the errors occur there are around 260-265 processes, about
10 of them are defuncts. The highest number of processes for one
regular user is 55 or so, root has around 85.

'sysconfig -q proc' gives me
max-proc-per-user = 267
max-threads-per-user = 532
per-proc-stack-size = 2097152
max-per-proc-stack-size = 33554432
per-proc-data-size = 134217728
max-per-proc-data-size = 1073741824
max-per-proc-address-space = 1073741824
per-proc-address-space = 1073741824
autonice = 0
open-max-soft = 4096
open-max-hard = 4096
ncallout = 362
ncallout_alloc_size = 8192
round-robin-switch-rate = 0
round_robin_switch_rate = 0
sched-min-idle = 0
sched_min_idle = 0
give-boost = 1
give_boost = 1


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Received on Tue Jul 08 1997 - 13:56:23 NZST

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