MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 10/13/01 through 10/19/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 37,866 2,305,495
MED90 7,879 305,442
MED85 5,557 48,713
MED80 4,940 19,418
MED75 4,620 13,178
MED66 4,719 17,778
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,689 57,174
2-4 a.m. 651 19,041
4-6 a.m. 266 13,333
6-8 a.m. 947 22,942
8-10 a.m. 4,925 243,508
10-12 a.m. 10,858 415,803
12-2 p.m. 11,718 456,020
2-4 p.m. 13,174 548,230
4-6 p.m. 10,425 457,302
6-8 p.m. 5,531 279,943
8-10 p.m. 3,493 116,010
10-12 p.m. 1,904 80,718
__________ _____________ _________________
Total: 65,581 2,710,024
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 2,418
Davis 320
Irvine 76
Los Angeles 575
Riverside 0
San Diego 490
San Francisco 721
Santa Barbara 7
Santa Cruz 13
Lawrence Berkeley 7
Lawrence Livermore 2
Los Alamos 0
MELWEB 0
Searchlight 10,547
Other - UC 49,982
Other-Network UC 423
_____
65,581
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 595,378
Davis 4,586
Irvine 651
Los Angeles 5,168
Riverside 0
San Diego 2,900
San Francisco 10,797
Santa Barbara 144
Santa Cruz 31
Lawrence Berkeley 21
Lawrence Livermore 17
Los Alamos 0
MELWEB 0
Searchlight 0
Other - UC 2,085,749
Other-Network UC 4,582
_____
2,710,024
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 2.5
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.1
Standard deviation in seconds 0.3
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:27
Average session length (minutes:seconds) 15:35
Longest session recorded (minutes:seconds) 252:32
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 514.0
Retrievals per search - standard deviation 7126.1
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 65,581 9.7%
PRESENT 581,914 85.8%
INIT or CLOSE 30,666 4.5%
OTHER 289 0.0%
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 4,007 4.4% 1,693 42.3% 5 1296.4 5141.5
PERSONAL AUTHOR 17,146 18.7% 4,996 29.1% 8 99.0 789.0
TITLE WORD 7,137 7.8% 2,728 38.2% 3 174.2 2080.2
SUBSET 118 0.1% 40 33.9% 19 396.0 942.1
SUBJECT WORD 116 0.1% 79 68.1% 6 5710.2 33553.8
SUBJECT 1,623 1.8% 922 56.8% 22 757.5 5030.0
EXACT SUBJECT 3,070 3.4% 920 30.0% 37 590.5 4652.3
MAJOR SUBJECT 89 0.1% 45 50.6% 14 586.2 2204.8
EXACT MAJOR SUBJ 264 0.3% 69 26.1% 44 447.5 1151.9
EXACT TITLE 719 0.8% 415 57.7% 1 22.2 228.1
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 3,019 3.3% 608 20.1% 242 667.2 1986.0
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 2 0.0% 1 50.0% 4 4.0 0.0
KEYWORD 38,965 42.6% 13,756 35.3% 20 1034.7 11173.2
DATE 3,799 4.2% 797 21.0% 99 254.4 784.6
LANGUAGE 4,226 4.6% 1,218 28.8% 29 345.1 1729.0
UNIQUE ID 55 0.1% 29 52.7% 1 1.0 0.0
ADDED 1,056 1.2% 459 43.5% 4 15.0 58.9
PUB TYPE 1,822 2.0% 376 20.6% 30 239.0 1101.0
AUTHOR AFFIL. 506 0.6% 210 41.5% 12 99.6 1251.8
CHEMICAL NAME 6 0.0% 1 16.7% 158 371.2 439.5
EXACT CHEMICAL 1 0.0% 1 100% 0 0.0 0.0
AT 3,386 3.7% 1,142 33.7% 26 833.7 3674.8
AGE 150 0.2% 52 34.7% 35 586.1 2887.0
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 93 0.1% 35 37.6% 180 545.4 1209.4
XXS 65 0.1% 29 44.6% 14 144.2 397.3
XMXS 37 0.0% 15 40.5% 6 55.3 153.4
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 43 0.0% 37 86.0% 2 27.8 63.3
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 18,281 27.9% 6,036 33.0% 13 330.2 2438.3
Single 47,300 72.1% 16,023 33.9% 18 948.4 10186.4
PRESENT commands, by type:
MARC 54.4%
OPAC 18.9%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS