MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 05/05/01 through 05/11/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 53,163 2,789,623
MED90 10,747 172,974
MED85 8,458 61,026
MED80 7,637 35,204
MED75 7,216 23,258
MED66 7,378 22,843
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 2,127 49,541
2-4 a.m. 1,006 30,531
4-6 a.m. 283 17,303
6-8 a.m. 1,241 69,764
8-10 a.m. 7,002 228,825
10-12 a.m. 14,845 512,334
12-2 p.m. 16,102 538,393
2-4 p.m. 19,343 609,486
4-6 p.m. 15,239 504,631
6-8 p.m. 8,682 245,116
8-10 p.m. 5,199 184,887
10-12 p.m. 3,530 114,117
__________ _____________ _________________
Total: 94,599 3,104,928
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 250
Davis 733
Irvine 214
Los Angeles 725
Riverside 138
San Diego 451
San Francisco 1,386
Santa Barbara 53
Santa Cruz 122
Lawrence Berkeley 137
Lawrence Livermore 13
Los Alamos 16
MELWEB 75,088
Searchlight 14,507
Other - UC 39
Other-Network UC 727
_____
94,599
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 1,624
Davis 8,486
Irvine 3,037
Los Angeles 9,540
Riverside 441
San Diego 5,034
San Francisco 9,535
Santa Barbara 236
Santa Cruz 427
Lawrence Berkeley 1,006
Lawrence Livermore 177
Los Alamos 239
MELWEB 3,017,274
Searchlight 41,181
Other - UC 477
Other-Network UC 6,214
_____
3,104,928
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.8
Standard deviation in seconds 3.1
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.5
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:59
Average session length (minutes:seconds) 17:51
Longest session recorded (minutes:seconds) 297:58
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 422.6
Retrievals per search - standard deviation 5515.6
Percent of searches completed with 0 results 35.0%
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 94,599 13.9%
PRESENT 542,861 79.8%
INIT or CLOSE 42,423 6.2%
OTHER 446 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 5,445 4.2% 2,211 40.6% 5 1031.8 4773.3
PERSONAL AUTHOR 26,067 19.9% 7,701 29.5% 8 85.3 818.7
TITLE WORD 10,605 8.1% 4,253 40.1% 4 320.8 4136.0
SUBSET 241 0.2% 72 29.9% 42 292.8 1464.5
SUBJECT WORD 327 0.2% 183 56.0% 18 564.4 2673.2
SUBJECT 2,740 2.1% 1,494 54.5% 20 1620.8 15146.5
EXACT SUBJECT 5,548 4.2% 1,443 26.0% 32 504.3 2977.9
MAJOR SUBJECT 244 0.2% 134 54.9% 44 696.1 2689.5
EXACT MAJOR SUBJ 679 0.5% 133 19.6% 19 402.5 3589.5
EXACT TITLE 734 0.6% 417 56.8% 1 101.6 974.4
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,105 0.8% 269 24.3% 400 2005.9 4589.8
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 3 0.0% 3 100% 0 0.0 0.0
KEYWORD 57,291 43.8% 20,876 36.4% 16 797.8 8061.0
DATE 2,012 1.5% 535 26.6% 7 121.1 747.8
LANGUAGE 7,054 5.4% 1,982 28.1% 28 439.6 2293.2
UNIQUE ID 255 0.2% 114 44.7% 1 1.0 0.2
ADDED 1,199 0.9% 698 58.2% 5 25.1 122.5
PUB TYPE 2,899 2.2% 619 21.4% 25 198.8 852.6
AUTHOR AFFIL. 669 0.5% 294 43.9% 7 54.3 287.5
CHEMICAL NAME 44 0.0% 34 77.3% 46 108.2 132.6
EXACT CHEMICAL 7 0.0% 6 85.7% 608 608.0 0.0
AT 5,027 3.8% 1,507 30.0% 26 618.8 3884.5
AGE 333 0.3% 99 29.7% 20 272.2 864.2
ISN 1 0.0% 1 100% 0 0.0 0.0
ARTICLE 128 0.1% 22 17.2% 58 2205.8 18371.3
XXS 122 0.1% 42 34.4% 16 59.7 155.1
XMXS 78 0.1% 29 37.2% 12 62.1 183.8
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 45 0.0% 35 77.8% 29 1798.0 2305.8
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 24,851 26.3% 8,653 34.8% 8 306.1 2936.4
Single 69,748 73.7% 24,499 35.1% 16 773.8 7762.5
PRESENT commands, by type:
MARC 29.3%
OPAC 29.9%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS