MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 01/01/01 through 01/31/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 202,874 10,063,297
MED90 42,706 773,300
MED85 32,500 293,808
MED80 27,803 150,520
MED75 25,615 96,366
MED66 25,988 106,612
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 7,291 134,431
2-4 a.m. 3,008 59,784
4-6 a.m. 1,367 32,467
6-8 a.m. 5,096 107,919
8-10 a.m. 26,215 795,621
10-12 a.m. 59,900 1,971,913
12-2 p.m. 61,457 2,011,153
2-4 p.m. 77,159 2,386,640
4-6 p.m. 57,564 1,933,098
6-8 p.m. 28,023 936,065
8-10 p.m. 19,379 698,801
10-12 p.m. 11,027 416,011
__________ _____________ _________________
Total: 357,486 11,483,903
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 1,617
Davis 4,624
Irvine 872
Los Angeles 3,973
Riverside 108
San Diego 2,725
San Francisco 4,981
Santa Barbara 142
Santa Cruz 84
Lawrence Berkeley 218
Lawrence Livermore 98
Los Alamos 1
MELWEB 289,318
Searchlight 45,116
Other - UC 369
Other-Network UC 3,240
_____
357,486
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 41,409
Davis 39,915
Irvine 12,589
Los Angeles 41,119
Riverside 1,759
San Diego 24,860
San Francisco 46,965
Santa Barbara 2,194
Santa Cruz 1,251
Lawrence Berkeley 2,102
Lawrence Livermore 1,069
Los Alamos 0
MELWEB 11,225,491
Searchlight 7,540
Other - UC 2,488
Other-Network UC 33,152
_____
11,483,903
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.7
Standard deviation in seconds 3.0
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) 21:14
Average session length (minutes:seconds) 18:46
Longest session recorded (minutes:seconds) 256:10
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 429.6
Retrievals per search - standard deviation 6358.4
Percent of searches completed with 0 results 34.1%
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 357,486 13.9%
PRESENT 2,062,713 80.2%
INIT or CLOSE 150,286 5.8%
OTHER 2,853 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 25,611 5.1% 9,618 37.6% 3 901.6 10162.4
PERSONAL AUTHOR 107530 21.3% 29,930 27.8% 7 89.3 1569.2
TITLE WORD 39,534 7.8% 14,370 36.3% 2 197.8 2350.1
SUBSET 784 0.2% 218 27.8% 30 380.4 1560.1
SUBJECT WORD 792 0.2% 371 46.8% 10 1345.9 8324.3
SUBJECT 10,941 2.2% 6,202 56.7% 15 719.9 5014.9
EXACT SUBJECT 20,825 4.1% 5,814 27.9% 33 535.0 3318.1
MAJOR SUBJECT 997 0.2% 540 54.2% 27 890.5 3723.6
EXACT MAJOR SUBJ 2,136 0.4% 552 25.8% 21 311.2 1140.8
EXACT TITLE 2,716 0.5% 1,711 63.0% 1 40.2 447.5
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 4,648 0.9% 1,340 28.8% 430 1752.6 3726.9
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 137 0.0% 57 41.6% 31 143.7 329.4
KEYWORD 208370 41.3% 74,500 35.8% 18 863.6 9461.2
DATE 8,679 1.7% 2,390 27.5% 7 246.9 4619.2
LANGUAGE 27,162 5.4% 8,013 29.5% 28 463.0 2873.8
UNIQUE ID 1,694 0.3% 573 33.8% 1 1.0 0.6
ADDED 4,603 0.9% 4,603 100% 0 0.0 0.0
PUB TYPE 12,273 2.4% 3,287 26.8% 23 179.0 781.4
AUTHOR AFFIL. 3,157 0.6% 1,456 46.1% 9 111.9 1503.3
CHEMICAL NAME 111 0.0% 68 61.3% 6 711.5 2176.9
EXACT CHEMICAL 12 0.0% 7 58.3% 6 250.8 441.8
AT 18,539 3.7% 6,319 34.1% 24 697.3 4621.4
AGE 1,048 0.2% 322 30.7% 27 192.8 873.9
ISN 4 0.0% 4 100% 0 0.0 0.0
ARTICLE 526 0.1% 136 25.9% 80 955.7 2769.8
XXS 1,328 0.3% 738 55.6% 10 2295.0 24664.2
XMXS 296 0.1% 158 53.4% 20 2016.7 10767.6
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 98 0.0% 68 69.4% 126 197.3 313.9
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 98,735 27.6% 36,052 36.5% 7 310.6 3131.3
Single 258,751 72.4% 85,712 33.1% 16 774.9 8928.5
PRESENT commands, by type:
MARC 31.1%
OPAC 30.2%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS