MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 11/01/01 through 11/30/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 140,163 7,250,486
MED90 29,168 392,678
MED85 23,742 158,331
MED80 21,703 84,790
MED75 20,775 50,536
MED66 21,110 65,783
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 6,364 206,100
2-4 a.m. 2,108 110,387
4-6 a.m. 1,217 54,358
6-8 a.m. 3,279 104,651
8-10 a.m. 17,858 646,461
10-12 a.m. 39,513 1,256,530
12-2 p.m. 45,970 1,314,286
2-4 p.m. 51,944 1,629,879
4-6 p.m. 42,863 1,294,871
6-8 p.m. 20,634 614,931
8-10 p.m. 14,171 418,820
10-12 p.m. 10,740 351,330
__________ _____________ _________________
Total: 256,661 8,002,604
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 1,647
Davis 1,620
Irvine 321
Los Angeles 2,714
Riverside 105
San Diego 1,582
San Francisco 2,733
Santa Barbara 197
Santa Cruz 95
Lawrence Berkeley 130
Lawrence Livermore 69
Los Alamos 0
MELWEB 0
Searchlight 53,341
Other - UC 190,495
Other-Network UC 1,612
_____
256,661
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 21,774
Davis 15,872
Irvine 3,039
Los Angeles 19,840
Riverside 1,389
San Diego 12,315
San Francisco 39,204
Santa Barbara 622
Santa Cruz 695
Lawrence Berkeley 2,082
Lawrence Livermore 1,362
Los Alamos 0
MELWEB 0
Searchlight 0
Other - UC 7,865,987
Other-Network UC 18,423
_____
8,002,604
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 3.2
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.4
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:06
Average session length (minutes:seconds) 14:38
Longest session recorded (minutes:seconds) 214:48
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 438.6
Retrievals per search - standard deviation 5343.3
Percent of searches completed with 0 results 36.8%
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 256,661 14.4%
PRESENT 1,397,182 78.4%
INIT or CLOSE 126,166 7.1%
OTHER 1,071 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 14,624 4.2% 5,744 39.3% 4 1172.8 5941.0
PERSONAL AUTHOR 67,286 19.2% 19,746 29.3% 7 84.0 726.3
TITLE WORD 29,655 8.5% 11,879 40.1% 3 185.0 2171.1
SUBSET 431 0.1% 135 31.3% 26 294.3 1135.4
SUBJECT WORD 409 0.1% 197 48.2% 23 1327.7 7436.5
SUBJECT 5,439 1.6% 2,979 54.8% 34 910.4 4405.7
EXACT SUBJECT 12,077 3.5% 3,464 28.7% 33 631.2 3941.5
MAJOR SUBJECT 422 0.1% 150 35.5% 31 626.3 2757.0
EXACT MAJOR SUBJ 1,071 0.3% 305 28.5% 32 396.0 1693.0
EXACT TITLE 2,769 0.8% 1,584 57.2% 1 28.3 232.3
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 3,356 1.0% 930 27.7% 374 1814.3 3568.7
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 62 0.0% 47 75.8% 3 49.3 158.3
KEYWORD 162324 46.4% 63,376 39.0% 17 879.2 8243.4
DATE 5,831 1.7% 1,386 23.8% 5 122.6 902.5
LANGUAGE 16,765 4.8% 4,875 29.1% 31 528.8 3923.4
UNIQUE ID 360 0.1% 221 61.4% 1 1.1 0.3
ADDED 2,243 0.6% 1,208 53.9% 5 206.0 4076.3
PUB TYPE 7,402 2.1% 1,765 23.8% 27 187.6 831.4
AUTHOR AFFIL. 2,095 0.6% 966 46.1% 11 101.1 967.0
CHEMICAL NAME 19 0.0% 9 47.4% 4 182.4 521.9
EXACT CHEMICAL 12 0.0% 4 33.3% 86 577.3 1081.5
AT 13,610 3.9% 4,415 32.4% 23 798.9 4711.6
AGE 643 0.2% 146 22.7% 31 208.1 610.4
ISN 1 0.0% 1 100% 0 0.0 0.0
ARTICLE 463 0.1% 109 23.5% 80 626.4 2211.7
XXS 272 0.1% 136 50.0% 28 645.1 5372.9
XMXS 145 0.0% 65 44.8% 14 117.1 374.1
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 158 0.0% 132 83.5% 5 238.3 499.0
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 63,083 24.6% 21,892 34.7% 8 351.9 3306.4
Single 193,578 75.4% 72,494 37.4% 16 810.0 7517.4
PRESENT commands, by type:
MARC 28.5%
OPAC 28.9%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS