MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 04/21/01 through 04/27/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 51,665 3,149,955
MED90 10,547 184,738
MED85 8,235 69,468
MED80 7,497 38,962
MED75 6,983 26,240
MED66 7,028 36,980
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 2,558 93,062
2-4 a.m. 364 25,805
4-6 a.m. 277 21,155
6-8 a.m. 1,353 57,740
8-10 a.m. 6,332 270,996
10-12 a.m. 14,746 538,267
12-2 p.m. 15,562 604,990
2-4 p.m. 18,845 665,309
4-6 p.m. 14,797 530,312
6-8 p.m. 7,671 324,432
8-10 p.m. 5,719 225,387
10-12 p.m. 3,731 148,888
__________ _____________ _________________
Total: 91,955 3,506,343
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 473
Davis 424
Irvine 112
Los Angeles 374
Riverside 65
San Diego 619
San Francisco 1,172
Santa Barbara 20
Santa Cruz 0
Lawrence Berkeley 28
Lawrence Livermore 51
Los Alamos 0
MELWEB 72,882
Searchlight 15,292
Other - UC 26
Other-Network UC 417
_____
91,955
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 4,801
Davis 3,727
Irvine 450
Los Angeles 7,923
Riverside 298
San Diego 5,821
San Francisco 27,183
Santa Barbara 114
Santa Cruz 0
Lawrence Berkeley 73
Lawrence Livermore 397
Los Alamos 0
MELWEB 3,272,538
Searchlight 177,347
Other - UC 8
Other-Network UC 5,663
_____
3,506,343
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 2.2
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.6
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:54
Average session length (minutes:seconds) 17:24
Longest session recorded (minutes:seconds) 381:38
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 451.0
Retrievals per search - standard deviation 5390.0
Percent of searches completed with 0 results 33.6%
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 91,955 12.2%
PRESENT 618,690 82.1%
INIT or CLOSE 42,117 5.6%
OTHER 581 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 5,180 4.1% 1,960 37.8% 5 1026.8 5047.0
PERSONAL AUTHOR 24,126 19.0% 6,872 28.5% 8 137.2 4651.1
TITLE WORD 9,608 7.6% 3,679 38.3% 3 150.9 1781.6
SUBSET 165 0.1% 44 26.7% 66 519.4 1621.6
SUBJECT WORD 158 0.1% 92 58.2% 8 273.7 1583.3
SUBJECT 2,533 2.0% 1,265 49.9% 22 1157.8 8422.1
EXACT SUBJECT 4,968 3.9% 1,325 26.7% 35 508.3 2758.7
MAJOR SUBJECT 150 0.1% 36 24.0% 20 156.1 411.1
EXACT MAJOR SUBJ 479 0.4% 149 31.1% 16 284.7 899.9
EXACT TITLE 785 0.6% 423 53.9% 1 24.5 257.6
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,189 0.9% 328 27.6% 414 2044.2 4506.4
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 57 0.0% 18 31.6% 62 269.3 306.7
KEYWORD 58,156 45.9% 20,392 35.1% 18 855.4 8044.4
DATE 1,731 1.4% 446 25.8% 9 180.6 1004.8
LANGUAGE 6,597 5.2% 1,793 27.2% 30 481.2 2805.6
UNIQUE ID 210 0.2% 84 40.0% 1 1.0 0.1
ADDED 1,311 1.0% 529 40.3% 10 40.9 111.1
PUB TYPE 2,687 2.1% 645 24.0% 27 181.0 613.1
AUTHOR AFFIL. 762 0.6% 287 37.7% 12 88.3 749.4
CHEMICAL NAME 32 0.0% 6 18.8% 1,213 954.1 517.7
EXACT CHEMICAL 2 0.0% 0 0.0% 2,911 2910.5 3937.9
AT 5,065 4.0% 1,465 28.9% 26 849.7 3899.6
AGE 271 0.2% 81 29.9% 20 336.8 1074.3
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 133 0.1% 28 21.1% 82 611.1 2886.4
XXS 171 0.1% 90 52.6% 11 237.1 1198.5
XMXS 66 0.1% 23 34.8% 22 106.4 253.4
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 60 0.0% 50 83.3% 37 829.9 2344.6
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 23,636 25.7% 7,902 33.4% 9 395.4 5370.3
Single 68,319 74.3% 23,013 33.7% 16 778.1 6978.9
PRESENT commands, by type:
MARC 25.2%
OPAC 34.5%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS