MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 11/04/00 through 11/10/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 46,304 2,421,622
MED90 10,032 179,788
MED85 7,781 71,084
MED80 6,979 34,015
MED75 6,643 25,869
MED66 6,762 31,846
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 2,187 49,160
2-4 a.m. 434 8,511
4-6 a.m. 219 9,919
6-8 a.m. 1,153 38,635
8-10 a.m. 5,873 200,560
10-12 a.m. 13,760 475,668
12-2 p.m. 15,429 496,958
2-4 p.m. 17,471 550,870
4-6 p.m. 13,807 479,406
6-8 p.m. 6,371 205,592
8-10 p.m. 5,020 149,261
10-12 p.m. 2,777 99,684
__________ _____________ _________________
Total: 84,501 2,764,224
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 177
Davis 790
Irvine 171
Los Angeles 423
Riverside 55
San Diego 538
San Francisco 801
Santa Barbara 68
Santa Cruz 10
Lawrence Berkeley 17
Lawrence Livermore 0
Los Alamos 0
MELWEB 64,963
Searchlight 15,642
Other - UC 71
Other-Network UC 775
_____
84,501
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 3,351
Davis 8,437
Irvine 1,642
Los Angeles 7,121
Riverside 428
San Diego 5,557
San Francisco 9,436
Santa Barbara 94
Santa Cruz 106
Lawrence Berkeley 394
Lawrence Livermore 0
Los Alamos 0
MELWEB 2,708,175
Searchlight 14,953
Other - UC 233
Other-Network UC 4,297
_____
2,764,224
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 1.0
Standard deviation in seconds 5.1
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) 20:45
Average session length (minutes:seconds) 16:51
Longest session recorded (minutes:seconds) 221:52
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 496.1
Retrievals per search - standard deviation 6852.3
Percent of searches completed with 0 results 35.5%
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 84,501 14.0%
PRESENT 478,089 79.4%
INIT or CLOSE 39,407 6.5%
OTHER 284 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 5,052 4.2% 2,302 45.6% 5 1017.2 4334.7
PERSONAL AUTHOR 20,709 17.1% 6,094 29.4% 7 73.6 516.0
TITLE WORD 8,754 7.2% 3,301 37.7% 3 246.0 3796.5
SUBSET 193 0.2% 47 24.4% 21 650.4 3710.6
SUBJECT WORD 138 0.1% 55 39.9% 7 750.1 3632.0
SUBJECT 2,678 2.2% 1,377 51.4% 26 908.9 6619.0
EXACT SUBJECT 5,675 4.7% 1,432 25.2% 38 917.1 13382.1
MAJOR SUBJECT 309 0.3% 147 47.6% 11 627.3 2423.7
EXACT MAJOR SUBJ 588 0.5% 142 24.1% 29 580.8 4005.4
EXACT TITLE 647 0.5% 401 62.0% 1 11.2 70.1
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,162 1.0% 392 33.7% 454 1790.5 4170.4
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 3 0.0% 1 33.3% 155 154.5 195.9
KEYWORD 53,627 44.3% 19,669 36.7% 18 952.0 9517.5
DATE 2,111 1.7% 484 22.9% 6 99.1 386.3
LANGUAGE 7,196 5.9% 2,003 27.8% 33 576.4 4363.6
UNIQUE ID 231 0.2% 48 20.8% 1 1.0 0.2
ADDED 1,159 1.0% 1,002 86.5% 5 17.4 34.4
PUB TYPE 3,160 2.6% 772 24.4% 25 267.5 2366.7
AUTHOR AFFIL. 834 0.7% 395 47.4% 9 82.3 631.2
CHEMICAL NAME 10 0.0% 8 80.0% 65 64.5 2.1
EXACT CHEMICAL 10 0.0% 8 80.0% 7 6.5 7.8
AT 5,877 4.9% 2,001 34.0% 28 756.2 5054.5
AGE 323 0.3% 76 23.5% 15 126.7 349.7
ISN 1 0.0% 1 100% 0 0.0 0.0
ARTICLE 257 0.2% 53 20.6% 37 385.5 1540.5
XXS 276 0.2% 116 42.0% 26 447.9 2114.5
XMXS 124 0.1% 69 55.6% 22 190.5 585.1
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% 31 36.0 38.7
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 23,351 27.6% 8,448 36.2% 9 371.5 3650.0
Single 61,150 72.4% 21,553 35.2% 17 918.9 9737.5
PRESENT commands, by type:
MARC 30.5%
OPAC 29.2%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS