MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 12/02/00 through 12/08/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 45,339 2,387,568
MED90 10,043 187,875
MED85 7,472 63,930
MED80 6,718 37,028
MED75 6,308 23,936
MED66 6,350 27,626
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 2,483 40,517
2-4 a.m. 505 10,456
4-6 a.m. 415 13,489
6-8 a.m. 1,214 37,630
8-10 a.m. 5,922 196,886
10-12 a.m. 13,676 484,119
12-2 p.m. 13,691 480,819
2-4 p.m. 17,149 538,178
4-6 p.m. 12,135 405,064
6-8 p.m. 6,598 247,066
8-10 p.m. 4,966 158,069
10-12 p.m. 3,476 115,670
__________ _____________ _________________
Total: 82,230 2,727,963
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 238
Davis 1,033
Irvine 121
Los Angeles 1,005
Riverside 24
San Diego 657
San Francisco 1,222
Santa Barbara 71
Santa Cruz 45
Lawrence Berkeley 65
Lawrence Livermore 31
Los Alamos 0
MELWEB 63,778
Searchlight 13,471
Other - UC 146
Other-Network UC 323
_____
82,230
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 2,636
Davis 7,730
Irvine 452
Los Angeles 6,622
Riverside 257
San Diego 5,660
San Francisco 8,303
Santa Barbara 575
Santa Cruz 1,009
Lawrence Berkeley 228
Lawrence Livermore 307
Los Alamos 0
MELWEB 2,688,384
Searchlight 1,278
Other - UC 1,431
Other-Network UC 3,091
_____
2,727,963
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.9
Standard deviation in seconds 3.5
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.4
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:50
Average session length (minutes:seconds) 17:18
Longest session recorded (minutes:seconds) 210:53
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 383.8
Retrievals per search - standard deviation 4239.2
Percent of searches completed with 0 results 35.3%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
SEARCH 82,230 14.0%
PRESENT 465,723 79.4%
INIT or CLOSE 37,986 6.5%
OTHER 696 0.1%
SEARCHes completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By index:
JOURNAL 4,969 4.4% 1,940 39.0% 5 646.2 2872.3
PERSONAL AUTHOR 23,225 20.7% 6,779 29.2% 8 70.4 555.0
TITLE WORD 8,794 7.8% 3,293 37.4% 3 163.3 1840.0
SUBSET 209 0.2% 56 26.8% 20 374.2 1865.1
SUBJECT WORD 220 0.2% 116 52.7% 6 179.4 779.0
SUBJECT 1,976 1.8% 1,030 52.1% 21 732.6 3736.1
EXACT SUBJECT 4,207 3.8% 1,149 27.3% 30 447.9 2716.9
MAJOR SUBJECT 187 0.2% 84 44.9% 26 327.3 1422.2
EXACT MAJOR SUBJ 414 0.4% 110 26.6% 20 365.7 1506.0
EXACT TITLE 753 0.7% 497 66.0% 1 7.9 30.6
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,196 1.1% 349 29.2% 337 1618.5 3231.2
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 3 0.0% 2 66.7% 54 54.0 0.0
KEYWORD 49,917 44.5% 18,740 37.5% 17 802.6 6653.5
DATE 1,325 1.2% 345 26.0% 9 104.9 403.9
LANGUAGE 5,386 4.8% 1,651 30.7% 28 394.5 2150.2
UNIQUE ID 443 0.4% 168 37.9% 1 1.2 1.1
ADDED 985 0.9% 961 97.6% 4 56.9 254.3
PUB TYPE 2,766 2.5% 633 22.9% 24 146.0 547.5
AUTHOR AFFIL. 605 0.5% 267 44.1% 7 81.9 501.0
CHEMICAL NAME 28 0.0% 22 78.6% 11 10.7 8.4
EXACT CHEMICAL 36 0.0% 18 50.0% 11 12.4 12.8
AT 3,841 3.4% 1,292 33.6% 21 487.8 2713.7
AGE 193 0.2% 64 33.2% 18 91.1 259.3
ISN 1 0.0% 1 100% 0 0.0 0.0
ARTICLE 99 0.1% 21 21.2% 84 1263.8 6011.0
XXS 255 0.2% 118 46.3% 12 621.9 3328.0
XMXS 68 0.1% 40 58.8% 7 16.6 24.3
XS 2 0 0.0% 0 0.0% 0 0.0 0.0
MXS 2 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 29 0.0% 19 65.5% 6 1449.2 4530.5
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By number of indexes:
Multiple 20,775 25.3% 7,631 36.7% 8 232.9 1690.0
Single 61,455 74.7% 21,431 34.9% 15 712.1 5980.2
PRESENT commands, by type:
MARC 29.8%
OPAC 27.5%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS