MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 10/21/00 through 10/27/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 50,813 2,705,590
MED90 10,390 176,791
MED85 8,108 59,863
MED80 7,259 37,258
MED75 6,787 25,146
MED66 6,927 29,162
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 2,542 53,896
2-4 a.m. 718 18,224
4-6 a.m. 465 9,381
6-8 a.m. 1,139 43,065
8-10 a.m. 6,954 228,508
10-12 a.m. 15,093 470,530
12-2 p.m. 16,302 539,894
2-4 p.m. 19,784 709,948
4-6 p.m. 13,609 460,422
6-8 p.m. 6,407 237,106
8-10 p.m. 4,183 159,205
10-12 p.m. 3,088 103,631
__________ _____________ _________________
Total: 90,284 3,033,810
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 261
Davis 737
Irvine 214
Los Angeles 449
Riverside 27
San Diego 747
San Francisco 840
Santa Barbara 34
Santa Cruz 183
Lawrence Berkeley 63
Lawrence Livermore 30
Los Alamos 0
MELWEB 70,622
Searchlight 15,388
Other - UC 137
Other-Network UC 552
_____
90,284
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 3,529
Davis 9,802
Irvine 1,247
Los Angeles 5,331
Riverside 216
San Diego 7,183
San Francisco 8,361
Santa Barbara 124
Santa Cruz 3,158
Lawrence Berkeley 594
Lawrence Livermore 109
Los Alamos 0
MELWEB 2,954,777
Searchlight 33,776
Other - UC 1,268
Other-Network UC 4,335
_____
3,033,810
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 3.3
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 1.1
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:50
Average session length (minutes:seconds) 17:11
Longest session recorded (minutes:seconds) 215:47
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 534.3
Retrievals per search - standard deviation 6121.7
Percent of searches completed with 0 results 33.7%
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 90,284 13.6%
PRESENT 528,986 80.0%
INIT or CLOSE 41,800 6.3%
OTHER 513 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 5,364 4.2% 2,223 41.4% 4 1012.2 4593.9
PERSONAL AUTHOR 24,579 19.2% 7,062 28.7% 8 90.6 786.6
TITLE WORD 9,161 7.2% 3,463 37.8% 3 127.7 1005.4
SUBSET 295 0.2% 71 24.1% 17 281.3 1768.2
SUBJECT WORD 228 0.2% 117 51.3% 5 149.3 449.1
SUBJECT 2,926 2.3% 1,423 48.6% 21 540.2 3752.3
EXACT SUBJECT 5,695 4.5% 1,334 23.4% 32 616.3 4335.6
MAJOR SUBJECT 341 0.3% 111 32.6% 11 385.9 2055.7
EXACT MAJOR SUBJ 722 0.6% 122 16.9% 21 372.4 3039.7
EXACT TITLE 781 0.6% 494 63.3% 1 33.5 192.6
TREE NUMBER 1 0.0% 0 0.0% 8,158 8158.0 0.0
EXACT JOURNAL 1,289 1.0% 449 34.8% 484 1871.0 3522.3
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 7 0.0% 3 42.9% 64 70.5 21.0
KEYWORD 55,167 43.2% 19,329 35.0% 17 1103.2 9449.4
DATE 2,096 1.6% 502 23.9% 5 146.8 1291.5
LANGUAGE 7,003 5.5% 1,878 26.8% 30 437.6 2603.6
UNIQUE ID 260 0.2% 44 16.9% 1 1.3 1.9
ADDED 1,118 0.9% 571 51.1% 4 10.9 20.6
PUB TYPE 2,812 2.2% 577 20.5% 23 151.5 527.0
AUTHOR AFFIL. 1,129 0.9% 592 52.4% 9 94.3 836.1
CHEMICAL NAME 13 0.0% 2 15.4% 5 119.5 322.7
EXACT CHEMICAL 1 0.0% 1 100% 0 0.0 0.0
AT 5,766 4.5% 1,920 33.3% 27 845.3 7301.6
AGE 437 0.3% 134 30.7% 11 194.1 620.4
ISN 2 0.0% 1 50.0% 1 1.0 0.0
ARTICLE 179 0.1% 42 23.5% 51 580.0 1798.8
XXS 237 0.2% 78 32.9% 17 1468.1 6632.4
XMXS 123 0.1% 46 37.4% 10 279.4 1270.1
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 20 0.0% 16 80.0% 54 54.0 0.0
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 24,467 27.1% 8,296 33.9% 9 353.7 3969.9
Single 65,817 72.9% 22,122 33.6% 16 973.0 8437.9
PRESENT commands, by type:
MARC 30.2%
OPAC 29.8%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS