Your message dated Sat, 15 Jul 2006 22:24:19 +0200
with message-id <[EMAIL PROTECTED]>
and subject line Bug#304812: slapadd takes days due to its sched_yield use
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--- Begin Message ---
Package: slapd
Version: 2.2.23-1
Hello,
slapd/slapadd use sched_yield on places where it really
should not be idling. Due to this upgrade from 2.1.30 to
2.2.23 takes more than 1 day on our 100000 objects tree
we have, with about 40 indexed attributes (after one day
I gave up, attached debugger to slapadd and overwrite
sched_yield procedure in slapadd with 'ret'; import
finished ~1 hour after I did that).
So I created shared library with function below, and
LD_PRELOADed it before upgrading replicas - replicas
were upgraded in about 1h15m, so I assume that slapadd
without killing sched_yield would take at least 4 days
with our configuration, which seems a bit too long to me.
It would be nice if upstream could eliminate at least
some useless sched_yield from code (if not all these
calls, I do not believe they are doing anything good
on 2.6.x kernels). Or you should warn users that
slapadd can take days, maybe weeks.
/*
%.so: %.c
gcc -W -Wall -O2 -shared -o $@ $< -ldl
*/
#define _GNU_SOURCE
#include <dlfcn.h>
int sched_yield(void) {
return 0;
}
Thanks,
Petr Vandrovec
--- End Message ---
--- Begin Message ---
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Hi,
The added -q option in 2.2.23 greatly improves the time to import a
database. So no need to have this bugreport open anymore.
Regards,
Matthijs Mohlmann
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