MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 08/25/01 through 08/31/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 34,372 1,735,852
MED90 6,569 129,434
MED85 4,977 46,024
MED80 4,329 27,769
MED75 3,966 14,511
MED66 4,007 14,329
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 2,115 55,736
2-4 a.m. 245 7,755
4-6 a.m. 231 10,015
6-8 a.m. 934 34,015
8-10 a.m. 4,714 169,044
10-12 a.m. 10,289 341,686
12-2 p.m. 10,697 335,224
2-4 p.m. 11,953 405,133
4-6 p.m. 8,689 305,860
6-8 p.m. 4,361 166,744
8-10 p.m. 2,340 83,396
10-12 p.m. 1,652 53,311
__________ _____________ _________________
Total: 58,220 1,967,919
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 438
Davis 721
Irvine 87
Los Angeles 447
Riverside 33
San Diego 653
San Francisco 1,150
Santa Barbara 24
Santa Cruz 38
Lawrence Berkeley 28
Lawrence Livermore 6
Los Alamos 4
MELWEB 0
Searchlight 3,965
Other - UC 50,385
Other-Network UC 241
_____
58,220
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 3,559
Davis 9,956
Irvine 20,025
Los Angeles 4,070
Riverside 396
San Diego 5,537
San Francisco 11,853
Santa Barbara 89
Santa Cruz 306
Lawrence Berkeley 102
Lawrence Livermore 144
Los Alamos 113
MELWEB 0
Searchlight 0
Other - UC 1,909,209
Other-Network UC 2,560
_____
1,967,919
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 2.1
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.5
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:23
Average session length (minutes:seconds) 19:40
Longest session recorded (minutes:seconds) 225:46
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 353.2
Retrievals per search - standard deviation 5060.6
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 58,220 12.8%
PRESENT 370,026 81.6%
INIT or CLOSE 24,622 5.4%
OTHER 629 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 4,064 5.0% 1,587 39.0% 4 948.0 4484.3
PERSONAL AUTHOR 19,748 24.4% 5,641 28.6% 7 100.3 962.8
TITLE WORD 6,845 8.4% 2,522 36.8% 3 208.5 2211.9
SUBSET 112 0.1% 23 20.5% 19 293.2 1225.6
SUBJECT WORD 117 0.1% 66 56.4% 13 208.5 813.6
SUBJECT 1,333 1.6% 632 47.4% 17 1237.3 10591.3
EXACT SUBJECT 3,137 3.9% 1,013 32.3% 26 563.9 3689.8
MAJOR SUBJECT 102 0.1% 39 38.2% 20 82.2 208.3
EXACT MAJOR SUBJ 251 0.3% 53 21.1% 16 275.7 1396.2
EXACT TITLE 706 0.9% 368 52.1% 1 5.3 19.0
TREE NUMBER 1 0.0% 0 0.0% 1 1.0 0.0
EXACT JOURNAL 712 0.9% 181 25.4% 267 1415.8 3170.3
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 28 0.0% 13 46.4% 4 154.9 382.6
KEYWORD 32,398 40.0% 11,680 36.1% 15 697.2 7986.4
DATE 1,495 1.8% 404 27.0% 6 122.6 1766.4
LANGUAGE 3,909 4.8% 1,225 31.3% 21 418.8 3290.4
UNIQUE ID 191 0.2% 84 44.0% 1 1.0 0.2
ADDED 1,143 1.4% 516 45.1% 4 15.7 33.9
PUB TYPE 1,770 2.2% 494 27.9% 20 163.7 823.0
AUTHOR AFFIL. 489 0.6% 186 38.0% 10 51.6 399.1
CHEMICAL NAME 5 0.0% 4 80.0% 1 1.0 0.0
EXACT CHEMICAL 1 0.0% 1 100% 0 0.0 0.0
AT 2,016 2.5% 717 35.6% 16 427.3 3140.2
AGE 101 0.1% 19 18.8% 17 243.5 684.9
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 139 0.2% 70 50.4% 30 120.7 226.7
XXS 182 0.2% 89 48.9% 10 39.8 120.0
XMXS 40 0.0% 10 25.0% 8 20.9 46.9
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 23 0.0% 19 82.6% 7 6.0 2.7
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 16,096 27.6% 5,638 35.0% 6 217.9 2236.2
Single 42,124 72.4% 13,945 33.1% 14 648.8 7132.7
PRESENT commands, by type:
MARC 33.1%
OPAC 28.8%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS