MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 04/07/01 through 04/13/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 50,395 3,439,989
MED90 10,148 187,861
MED85 7,861 66,251
MED80 6,893 46,623
MED75 6,448 35,144
MED66 6,634 47,983
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 2,286 209,210
2-4 a.m. 844 156,213
4-6 a.m. 414 88,227
6-8 a.m. 1,353 156,557
8-10 a.m. 5,888 286,956
10-12 a.m. 14,380 515,880
12-2 p.m. 15,438 552,776
2-4 p.m. 17,134 627,813
4-6 p.m. 14,101 543,519
6-8 p.m. 7,964 295,969
8-10 p.m. 5,325 239,308
10-12 p.m. 3,252 151,423
__________ _____________ _________________
Total: 88,379 3,823,851
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 410
Davis 422
Irvine 69
Los Angeles 1,017
Riverside 45
San Diego 678
San Francisco 1,142
Santa Barbara 95
Santa Cruz 63
Lawrence Berkeley 37
Lawrence Livermore 4
Los Alamos 0
MELWEB 71,201
Searchlight 12,475
Other - UC 138
Other-Network UC 583
_____
88,379
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 4,182
Davis 4,731
Irvine 1,266
Los Angeles 11,488
Riverside 569
San Diego 6,336
San Francisco 9,643
Santa Barbara 1,346
Santa Cruz 415
Lawrence Berkeley 246
Lawrence Livermore 24
Los Alamos 0
MELWEB 3,001,044
Searchlight 777,259
Other - UC 1,042
Other-Network UC 4,260
_____
3,823,851
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 0.3
Standard deviation in seconds 0.8
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:07
Average session length (minutes:seconds) 18:33
Longest session recorded (minutes:seconds) 219:39
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 423.5
Retrievals per search - standard deviation 5915.0
Percent of searches completed with 0 results 33.3%
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 88,379 10.7%
PRESENT 701,146 84.6%
INIT or CLOSE 38,973 4.7%
OTHER 315 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 5,317 4.3% 2,131 40.1% 4 998.2 4476.1
PERSONAL AUTHOR 26,317 21.3% 7,584 28.8% 6 77.0 640.8
TITLE WORD 10,781 8.7% 4,012 37.2% 3 247.0 5191.4
SUBSET 202 0.2% 44 21.8% 29 285.2 1121.8
SUBJECT WORD 130 0.1% 74 56.9% 10 134.8 385.5
SUBJECT 2,242 1.8% 1,064 47.5% 17 843.9 5314.4
EXACT SUBJECT 4,742 3.8% 1,143 24.1% 35 578.2 3227.5
MAJOR SUBJECT 133 0.1% 44 33.1% 14 142.1 577.0
EXACT MAJOR SUBJ 449 0.4% 58 12.9% 23 232.5 662.1
EXACT TITLE 598 0.5% 298 49.8% 1 12.0 56.0
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,116 0.9% 233 20.9% 520 2017.8 4168.1
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 15 0.0% 4 26.7% 38 32.7 25.3
KEYWORD 52,370 42.5% 18,246 34.8% 18 832.8 9237.0
DATE 2,344 1.9% 610 26.0% 5 114.9 929.7
LANGUAGE 6,048 4.9% 1,433 23.7% 28 386.3 2499.7
UNIQUE ID 241 0.2% 99 41.1% 1 1.1 0.9
ADDED 1,235 1.0% 383 31.0% 18 72.8 158.2
PUB TYPE 2,829 2.3% 574 20.3% 24 146.7 491.2
AUTHOR AFFIL. 742 0.6% 329 44.3% 9 107.5 1072.2
CHEMICAL NAME 61 0.0% 50 82.0% 10 176.9 383.9
EXACT CHEMICAL 2 0.0% 2 100% 0 0.0 0.0
AT 4,674 3.8% 1,370 29.3% 21 592.0 3845.1
AGE 226 0.2% 68 30.1% 28 157.5 724.8
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 132 0.1% 46 34.8% 36 210.1 552.7
XXS 194 0.2% 75 38.7% 27 394.6 1699.5
XMXS 83 0.1% 25 30.1% 11 825.2 3380.3
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 49 0.0% 46 93.9% 3 248.7 425.5
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 24,164 27.3% 7,702 31.9% 7 282.3 3745.1
Single 64,215 72.7% 21,719 33.8% 17 771.4 8190.2
PRESENT commands, by type:
MARC 21.6%
OPAC 46.3%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS