Full_Name: Donal Duane Version: 2.4.16 OS: Solaris 10 URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (95.45.199.134)

Hi,

I would like to know if this is a known issue, and if so, if a fix has been issued.

We have only recently started using OpenLDAP 2.4.16 on Solaris 10, x86 HW. (Because of this, we have no previous benchmark for CPU usage for OpenDLAP for comparison - we also have sparc systems, but have not stress tested OpenLDAP on sparc yet).

We have noticed that the slapd process is using a huge amount of CPU.

There are massive CPU time spikes obvious over a period of time which we monitored, reaching 520 CPU seconds and even 700 CPU seconds at one stage. there are also some completely flat periods.

The activities seem to be purely LDAP searches.

Processor info:

# psrinfo -pv The physical processor has 4 virtual processors (0 4 8 12) x86 (chipid 0x0 GenuineIntel family 6 model 29 step 1 clock 2400 MHz) Intel(r) Xeon(r) CPU E7440 @ 2.40GHz The physical processor has 4 virtual processors (1 5 9 13) x86 (chipid 0x1 GenuineIntel family 6 model 29 step 1 clock 2400 MHz) Intel(r) Xeon(r) CPU E7440 @ 2.40GHz The physical processor has 4 virtual processors (2 6 10 14) x86 (chipid 0x2 GenuineIntel family 6 model 29 step 1 clock 2400 MHz) Intel(r) Xeon(r) CPU E7440 @ 2.40GHz The physical processor has 4 virtual processors (3 7 11 15) x86 (chipid 0x3 GenuineIntel family 6 model 29 step 1 clock 2400 MHz) Intel(r) Xeon(r) CPU E7440 @ 2.40GHz

# isainfo -b 64

=> (64 bit)

# uname -a SunOS atrcxb1226 5.10 Generic_142901-13 i86pc i386 i86pc

Any help appreciated.

Regards, Dónal