MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 03/24/01 through 03/30/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 39,097 2,445,752
MED90 8,068 167,948
MED85 6,011 62,213
MED80 5,183 30,772
MED75 4,796 26,331
MED66 4,879 30,276
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,453 216,315
2-4 a.m. 606 41,540
4-6 a.m. 307 92,586
6-8 a.m. 1,098 76,816
8-10 a.m. 5,510 199,868
10-12 a.m. 11,513 397,919
12-2 p.m. 12,568 401,604
2-4 p.m. 14,204 506,616
4-6 p.m. 10,833 442,149
6-8 p.m. 4,831 190,590
8-10 p.m. 3,100 108,655
10-12 p.m. 2,011 88,634
__________ _____________ _________________
Total: 68,034 2,763,292
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 284
Davis 664
Irvine 56
Los Angeles 970
Riverside 14
San Diego 662
San Francisco 949
Santa Barbara 5
Santa Cruz 1
Lawrence Berkeley 46
Lawrence Livermore 6
Los Alamos 1
MELWEB 57,322
Searchlight 6,186
Other - UC 133
Other-Network UC 735
_____
68,034
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 2,624
Davis 9,224
Irvine 523
Los Angeles 8,496
Riverside 171
San Diego 4,486
San Francisco 11,166
Santa Barbara 3
Santa Cruz 30
Lawrence Berkeley 243
Lawrence Livermore 4
Los Alamos 46
MELWEB 2,359,156
Searchlight 356,199
Other - UC 889
Other-Network UC 10,032
_____
2,763,292
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 2.9
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) 21:45
Average session length (minutes:seconds) 20:53
Longest session recorded (minutes:seconds) 196:55
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 377.6
Retrievals per search - standard deviation 4876.9
Percent of searches completed with 0 results 32.6%
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 68,034 11.3%
PRESENT 507,556 84.1%
INIT or CLOSE 27,541 4.6%
OTHER 312 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 4,768 5.0% 1,931 40.5% 4 623.9 3919.3
PERSONAL AUTHOR 22,781 23.8% 6,718 29.5% 7 97.8 1164.4
TITLE WORD 8,698 9.1% 3,537 40.7% 3 128.1 1310.4
SUBSET 160 0.2% 35 21.9% 15 124.1 263.6
SUBJECT WORD 184 0.2% 91 49.5% 10 433.6 2588.4
SUBJECT 1,589 1.7% 781 49.1% 12 757.0 6350.0
EXACT SUBJECT 3,313 3.5% 902 27.2% 31 378.4 1741.4
MAJOR SUBJECT 93 0.1% 30 32.3% 21 305.2 1550.9
EXACT MAJOR SUBJ 354 0.4% 79 22.3% 19 197.3 718.1
EXACT TITLE 741 0.8% 442 59.6% 1 8.9 46.5
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 835 0.9% 222 26.6% 560 2148.9 3952.6
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 36 0.0% 7 19.4% 52 54.3 52.3
KEYWORD 37,959 39.6% 12,644 33.3% 18 774.6 7671.4
DATE 1,764 1.8% 534 30.3% 5 118.0 769.8
LANGUAGE 4,710 4.9% 1,281 27.2% 25 300.0 2677.6
UNIQUE ID 204 0.2% 75 36.8% 1 1.1 0.5
ADDED 1,187 1.2% 397 33.4% 12 63.1 159.2
PUB TYPE 2,467 2.6% 719 29.1% 19 136.2 506.3
AUTHOR AFFIL. 647 0.7% 328 50.7% 7 38.6 152.2
CHEMICAL NAME 55 0.1% 49 89.1% 23 57.3 70.7
EXACT CHEMICAL 2 0.0% 2 100% 0 0.0 0.0
AT 2,717 2.8% 840 30.9% 20 466.3 4115.0
AGE 187 0.2% 51 27.3% 17 84.4 195.7
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 54 0.1% 12 22.2% 75 897.8 2411.0
XXS 166 0.2% 94 56.6% 26 320.3 1581.4
XMXS 56 0.1% 25 44.6% 27 60.6 67.6
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 17 0.0% 15 88.2% 504 503.5 671.0
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 19,885 29.2% 7,155 36.0% 7 171.2 1916.6
Single 48,149 70.8% 15,017 31.2% 16 709.5 6870.7
PRESENT commands, by type:
MARC 25.6%
OPAC 39.2%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS