MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 09/29/01 through 10/05/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 36,377 1,956,380
MED90 6,442 125,267
MED85 4,923 43,570
MED80 4,242 30,850
MED75 3,961 16,051
MED66 4,078 18,070
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,885 63,648
2-4 a.m. 724 28,776
4-6 a.m. 197 10,290
6-8 a.m. 943 31,650
8-10 a.m. 4,639 185,793
10-12 a.m. 9,973 379,963
12-2 p.m. 10,623 383,220
2-4 p.m. 12,021 419,575
4-6 p.m. 9,672 342,483
6-8 p.m. 4,495 163,696
8-10 p.m. 2,841 107,338
10-12 p.m. 2,010 73,756
__________ _____________ _________________
Total: 60,023 2,190,188
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 360
Davis 363
Irvine 109
Los Angeles 625
Riverside 23
San Diego 297
San Francisco 540
Santa Barbara 5
Santa Cruz 32
Lawrence Berkeley 10
Lawrence Livermore 3
Los Alamos 31
MELWEB 0
Searchlight 6,712
Other - UC 50,616
Other-Network UC 297
_____
60,023
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 3,910
Davis 5,563
Irvine 485
Los Angeles 11,430
Riverside 213
San Diego 2,153
San Francisco 11,822
Santa Barbara 16
Santa Cruz 229
Lawrence Berkeley 138
Lawrence Livermore 192
Los Alamos 116
MELWEB 0
Searchlight 0
Other - UC 2,149,217
Other-Network UC 4,704
_____
2,190,188
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 3.5
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) 21:06
Average session length (minutes:seconds) 18:11
Longest session recorded (minutes:seconds) 181:55
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 428.0
Retrievals per search - standard deviation 6465.2
Percent of searches completed with 0 results 33.5%
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 60,023 12.7%
PRESENT 386,260 81.6%
INIT or CLOSE 26,694 5.6%
OTHER 191 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 4,359 5.2% 1,816 41.7% 4 981.1 4513.0
PERSONAL AUTHOR 19,119 22.6% 5,553 29.0% 7 82.8 719.2
TITLE WORD 7,149 8.5% 2,743 38.4% 4 330.9 4766.9
SUBSET 105 0.1% 31 29.5% 18 776.2 4582.4
SUBJECT WORD 56 0.1% 32 57.1% 58 384.5 635.3
SUBJECT 1,539 1.8% 859 55.8% 17 371.9 2685.8
EXACT SUBJECT 2,988 3.5% 891 29.8% 31 504.6 2820.1
MAJOR SUBJECT 70 0.1% 30 42.9% 18 71.8 220.5
EXACT MAJOR SUBJ 234 0.3% 52 22.2% 18 235.6 620.1
EXACT TITLE 664 0.8% 404 60.8% 1 35.1 374.2
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 906 1.1% 267 29.5% 370 2108.1 4470.7
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 92 0.1% 28 30.4% 34 308.6 478.2
KEYWORD 34,516 40.8% 11,840 34.3% 17 832.7 10115.8
DATE 1,289 1.5% 319 24.7% 9 124.0 563.2
LANGUAGE 3,877 4.6% 1,158 29.9% 27 485.6 2803.4
UNIQUE ID 235 0.3% 170 72.3% 1 238.4 1913.9
ADDED 1,210 1.4% 653 54.0% 5 15.3 37.1
PUB TYPE 2,164 2.6% 509 23.5% 20 156.0 611.4
AUTHOR AFFIL. 476 0.6% 192 40.3% 10 55.0 359.1
CHEMICAL NAME 22 0.0% 7 31.8% 600 504.2 386.0
EXACT CHEMICAL 1 0.0% 1 100% 0 0.0 0.0
AT 2,930 3.5% 1,021 34.8% 21 704.3 3663.2
AGE 230 0.3% 44 19.1% 32 169.3 504.7
ISN 1 0.0% 1 100% 0 0.0 0.0
ARTICLE 57 0.1% 22 38.6% 131 1222.8 4126.6
XXS 119 0.1% 54 45.4% 13 477.9 1687.3
XMXS 39 0.0% 17 43.6% 11 119.9 465.9
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 55 0.1% 44 80.0% 1 3.4 4.1
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 17,169 28.6% 6,001 34.9% 7 249.6 1961.2
Single 42,854 71.4% 14,096 32.9% 17 796.4 9245.2
PRESENT commands, by type:
MARC 26.0%
OPAC 31.0%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS