MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 07/22/00 through 07/28/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 40,618 2,003,080
MED90 9,418 150,712
MED85 6,945 53,290
MED80 5,993 32,689
MED75 5,609 37,317
MED66 5,629 24,860
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 2,268 81,185
2-4 a.m. 359 23,979
4-6 a.m. 221 10,382
6-8 a.m. 1,040 27,576
8-10 a.m. 6,275 225,546
10-12 a.m. 13,296 393,865
12-2 p.m. 13,005 392,082
2-4 p.m. 15,570 451,159
4-6 p.m. 12,162 359,899
6-8 p.m. 5,665 166,629
8-10 p.m. 2,658 95,797
10-12 p.m. 1,693 73,849
__________ _____________ _________________
Total: 74,212 2,301,948
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 585
Davis 1,679
Irvine 80
Los Angeles 586
Riverside 3
San Diego 1,238
San Francisco 1,147
Santa Barbara 64
Santa Cruz 28
Lawrence Berkeley 65
Lawrence Livermore 26
Los Alamos 0
MELWEB 61,771
Searchlight 6,276
Other - UC 44
Other-Network UC 620
_____
74,212
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 7,339
Davis 9,709
Irvine 323
Los Angeles 5,466
Riverside 31
San Diego 6,391
San Francisco 9,759
Santa Barbara 531
Santa Cruz 97
Lawrence Berkeley 848
Lawrence Livermore 395
Los Alamos 0
MELWEB 2,178,213
Searchlight 77,700
Other - UC 214
Other-Network UC 4,932
_____
2,301,948
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 1.1
Standard deviation in seconds 3.0
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.5
Standard deviation in seconds 1.0
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:12
Average session length (minutes:seconds) 18:38
Longest session recorded (minutes:seconds) 272:41
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 459.6
Retrievals per search - standard deviation 4416.4
Percent of searches completed with 0 results 32.3%
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 74,212 14.0%
PRESENT 421,988 79.8%
INIT or CLOSE 31,971 6.0%
OTHER 617 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 4,569 4.3% 1,817 39.8% 4 1231.9 5078.4
PERSONAL AUTHOR 24,194 22.8% 6,716 27.8% 6 66.6 611.5
TITLE WORD 8,805 8.3% 3,087 35.1% 2 98.6 878.3
SUBSET 231 0.2% 82 35.5% 38 151.2 327.6
SUBJECT WORD 145 0.1% 75 51.7% 17 631.8 3791.8
SUBJECT 1,883 1.8% 984 52.3% 16 719.5 3730.7
EXACT SUBJECT 4,605 4.3% 1,290 28.0% 26 522.5 3252.9
MAJOR SUBJECT 145 0.1% 55 37.9% 6 367.8 2384.6
EXACT MAJOR SUBJ 357 0.3% 78 21.8% 22 579.1 2228.6
EXACT TITLE 806 0.8% 457 56.7% 1 8.8 35.5
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,558 1.5% 503 32.3% 43 1033.7 2653.2
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 12 0.0% 8 66.7% 12 12.0 3.5
KEYWORD 41,817 39.3% 14,110 33.7% 16 978.1 6919.1
DATE 1,928 1.8% 417 21.6% 5 131.1 1379.7
LANGUAGE 5,683 5.3% 1,632 28.7% 21 485.4 4752.3
UNIQUE ID 261 0.2% 79 30.3% 1 1.0 0.2
ADDED 1,618 1.5% 749 46.3% 4 16.3 26.7
PUB TYPE 2,695 2.5% 728 27.0% 19 120.9 789.7
AUTHOR AFFIL. 717 0.7% 230 32.1% 11 75.6 644.4
CHEMICAL NAME 139 0.1% 129 92.8% 2 927.1 2640.5
EXACT CHEMICAL 0 0.0% 0 0.0% 0 0.0 0.0
AT 3,553 3.3% 1,260 35.5% 15 400.3 3000.7
AGE 190 0.2% 67 35.3% 20 162.5 451.3
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 135 0.1% 62 45.9% 66 972.1 5427.0
XXS 214 0.2% 81 37.8% 11 256.6 1389.8
XMXS 78 0.1% 31 39.7% 8 370.0 1669.0
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 4 0.0% 3 75.0% 1,715 1715.0 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 21,553 29.0% 7,148 33.2% 6 248.6 2942.9
Single 52,659 71.0% 16,852 32.0% 15 852.5 6052.1
PRESENT commands, by type:
MARC 32.0%
OPAC 31.6%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS