MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 08/01/00 through 08/31/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 179,673 9,007,844
MED90 37,375 805,771
MED85 26,428 295,597
MED80 22,577 145,566
MED75 20,735 90,710
MED66 21,013 94,073
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 7,075 226,107
2-4 a.m. 2,834 49,255
4-6 a.m. 1,395 65,579
6-8 a.m. 4,775 147,655
8-10 a.m. 24,466 830,149
10-12 a.m. 54,744 1,837,827
12-2 p.m. 54,655 1,814,160
2-4 p.m. 66,480 2,197,885
4-6 p.m. 50,294 1,724,134
6-8 p.m. 21,310 726,220
8-10 p.m. 12,192 466,819
10-12 p.m. 7,581 353,771
__________ _____________ _________________
Total: 307,801 10,439,561
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 1,765
Davis 3,859
Irvine 521
Los Angeles 2,692
Riverside 186
San Diego 4,058
San Francisco 6,097
Santa Barbara 486
Santa Cruz 453
Lawrence Berkeley 154
Lawrence Livermore 244
Los Alamos 0
MELWEB 252,848
Searchlight 31,828
Other - UC 539
Other-Network UC 2,071
_____
307,801
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 15,191
Davis 30,179
Irvine 4,115
Los Angeles 39,040
Riverside 1,143
San Diego 32,935
San Francisco 65,164
Santa Barbara 6,235
Santa Cruz 4,007
Lawrence Berkeley 1,224
Lawrence Livermore 2,477
Los Alamos 0
MELWEB 9,872,533
Searchlight 326,586
Other - UC 2,906
Other-Network UC 35,826
_____
10,439,561
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 3.0
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) 21:29
Average session length (minutes:seconds) 19:40
Longest session recorded (minutes:seconds) 270:30
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 401.3
Retrievals per search - standard deviation 4567.3
Percent of searches completed with 0 results 32.2%
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 307,801 13.0%
PRESENT 1,926,455 81.4%
INIT or CLOSE 129,287 5.5%
OTHER 1,872 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 21,432 4.9% 8,493 39.6% 4 760.1 4012.0
PERSONAL AUTHOR 100884 22.9% 28,052 27.8% 7 83.2 886.2
TITLE WORD 34,716 7.9% 12,843 37.0% 3 153.7 1649.1
SUBSET 763 0.2% 172 22.5% 26 233.7 1284.0
SUBJECT WORD 1,526 0.3% 739 48.4% 7 807.2 8386.4
SUBJECT 8,777 2.0% 4,254 48.5% 19 825.6 7054.6
EXACT SUBJECT 17,833 4.0% 4,342 24.3% 30 466.6 3566.2
MAJOR SUBJECT 834 0.2% 316 37.9% 12 706.7 4807.6
EXACT MAJOR SUBJ 1,582 0.4% 307 19.4% 21 450.3 3086.8
EXACT TITLE 3,416 0.8% 1,941 56.8% 1 17.4 238.6
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 6,113 1.4% 2,265 37.1% 236 1349.9 2841.2
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 105 0.0% 51 48.6% 17 194.1 621.8
KEYWORD 170612 38.7% 56,716 33.2% 16 825.4 7103.8
DATE 8,994 2.0% 2,042 22.7% 4 137.0 1805.8
LANGUAGE 23,870 5.4% 6,396 26.8% 24 373.6 2880.7
UNIQUE ID 1,589 0.4% 255 16.0% 1 1.1 0.6
ADDED 6,811 1.5% 3,516 51.6% 5 17.7 36.4
PUB TYPE 11,018 2.5% 2,593 23.5% 22 149.6 849.0
AUTHOR AFFIL. 3,065 0.7% 1,254 40.9% 8 114.3 1061.8
CHEMICAL NAME 74 0.0% 63 85.1% 12 77.9 109.5
EXACT CHEMICAL 15 0.0% 12 80.0% 11 15.0 6.9
AT 14,592 3.3% 4,469 30.6% 20 513.4 4314.3
AGE 786 0.2% 195 24.8% 31 197.2 624.6
ISN 3 0.0% 3 100% 0 0.0 0.0
ARTICLE 408 0.1% 119 29.2% 50 221.0 626.2
XXS 1,027 0.2% 418 40.7% 17 928.0 6349.8
XMXS 442 0.1% 147 33.3% 20 213.5 1636.3
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 42 0.0% 26 61.9% 3 908.8 2453.7
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 90,994 29.6% 30,586 33.6% 6 232.0 2642.0
Single 216,807 70.4% 68,492 31.6% 15 738.4 6341.6
PRESENT commands, by type:
MARC 32.3%
OPAC 31.2%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS