I'm going to read this email as soon as the smoke clears... --- Alex Karasulu <[EMAIL PROTECTED]> wrote:
> Hi all, > > I've been testing the search performance boost > gained from indexing > attributes before starting development on an > optimization to improve > index performance and in memory size. I thought I'd > share these > dramatic results of my pre-optimization tests with > you since they > clearly show the benefits of indices. > > Before I do this let me list the characteristics of > the hardware used > and my configuration settings: > > > ------------- > Machine Setup > ------------- > > CPU: Dual Athlon MP 1900 > OS: Linux 2.6.15 > Mem: 2GB 266Mhz > > > -------------- > ApacheDS Setup > -------------- > > ApacheDS: Stock RC4 (to be released pre-image) w/ > modifications > - Using 1024MB Memory > - Indexed st and initials > > > ---------- > Data Setup > ---------- > > Wrote a simple tool to generate random values for > descent sized entries. > The data sort of looks like this for a user entry: > > dn: uid=user.1,ou=users,dc=example,dc=com > uid: user.1 > initials: yq > description: cFocJATNuhlXisDCqGtY > pager: FYyimqyZRW > cn: HSGMzajYKmicUTe > postalcode: WiXXA > st: xy > street: kpCCqmrsCzkpdtHXWMfY > l: KqmAXFYTrI > objectclass: person > objectclass: organizationalPerson > objectclass: inetOrgPerson > sn: nuymgOwpm > homephone: PERamkCtsv > mobile: vkIviOGNTC > telephonenumber: 7248889026 > mail: pYvEoOjSnEymcWD > givenname: IVHJZB > postaladdress: crObexKoUTIFdzNHcZMr > employeenumber: 1 > userpassword:: cGFzc3dvcmQ= > > I started loading a partition up with these entries > 100,000 of them at a > time then performing the following searches for all > entries with > initials aa: > > (1) index on initials but no cached entries > (2) index on initials with cached entries > (3) no index without cached entries > > Here are the results at the various capacities: > > --------------- > 100,000 Entries > --------------- > > [cached] [indexed] [time (seconds)] > > (1) no yes 3.30 > (2) yes yes 0.72 > (3) no no 30.63 > > search results = 153 entries > > > --------------- > 200,000 Entries > --------------- > > [cached] [indexed] [time (seconds)] > > (1) no yes 6.04 > (2) yes yes 1.44 > (3) no no 82 > > search results = 302 entries > > > --------------- > 300,000 Entries > --------------- > > [cached] [indexed] [time (seconds)] > > (1) no yes 7.54 > (2) yes yes 1.95 > (3) no no 146 > > search results = 451 entries > > > --------------- > 400,000 Entries > --------------- > > [cached] [indexed] [time (seconds)] > > (1) no yes 9.24 > (2) yes yes 3.80 > (3) no no 196 > > search results = 586 entries > > > --------------- > 500,000 Entries > --------------- > > [cached] [indexed] [time (seconds)] > > (1) no yes 11.96 > (2) yes yes 3.21 > (3) no no 224 > > search results = 748 entries > > > Alex > > > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
