MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 07/07/01 through 07/13/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 45,337 2,424,812
MED90 8,745 167,810
MED85 6,495 64,190
MED80 5,752 37,515
MED75 5,308 25,604
MED66 5,419 22,431
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,589 41,878
2-4 a.m. 786 29,724
4-6 a.m. 236 11,310
6-8 a.m. 1,052 36,465
8-10 a.m. 5,272 201,222
10-12 a.m. 13,980 467,169
12-2 p.m. 14,307 494,693
2-4 p.m. 17,663 606,092
4-6 p.m. 12,410 452,027
6-8 p.m. 5,206 219,714
8-10 p.m. 2,890 108,787
10-12 p.m. 1,665 73,281
__________ _____________ _________________
Total: 77,056 2,742,362
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 486
Davis 600
Irvine 976
Los Angeles 907
Riverside 86
San Diego 292
San Francisco 860
Santa Barbara 86
Santa Cruz 0
Lawrence Berkeley 155
Lawrence Livermore 2
Los Alamos 2
MELWEB 240
Searchlight 5,760
Other - UC 65,838
Other-Network UC 766
_____
77,056
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 4,953
Davis 7,027
Irvine 9,893
Los Angeles 13,284
Riverside 262
San Diego 4,858
San Francisco 6,284
Santa Barbara 447
Santa Cruz 0
Lawrence Berkeley 3,511
Lawrence Livermore 19
Los Alamos 0
MELWEB 0
Searchlight 0
Other - UC 2,686,621
Other-Network UC 5,203
_____
2,742,362
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 2.5
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.3
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:36
Average session length (minutes:seconds) 20:10
Longest session recorded (minutes:seconds) 213:07
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 645.3
Retrievals per search - standard deviation 6996.6
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 77,056 13.0%
PRESENT 485,508 81.7%
INIT or CLOSE 31,739 5.3%
OTHER 293 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 5,666 5.2% 2,196 38.8% 4 764.6 3185.6
PERSONAL AUTHOR 25,291 23.3% 7,228 28.6% 7 83.3 721.1
TITLE WORD 10,150 9.4% 3,901 38.4% 2 133.1 1378.1
SUBSET 143 0.1% 32 22.4% 24 197.0 666.6
SUBJECT WORD 102 0.1% 39 38.2% 10 1612.4 6978.0
SUBJECT 1,991 1.8% 993 49.9% 15 449.7 3371.0
EXACT SUBJECT 3,762 3.5% 909 24.2% 29 496.6 3548.1
MAJOR SUBJECT 112 0.1% 32 28.6% 20 775.0 3610.7
EXACT MAJOR SUBJ 350 0.3% 86 24.6% 19 289.4 828.2
EXACT TITLE 775 0.7% 475 61.3% 1 8.5 71.7
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,016 0.9% 303 29.8% 438 1844.5 3451.4
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 11 0.0% 9 81.8% 35 35.0 48.1
KEYWORD 42,830 39.5% 14,251 33.3% 17 1479.8 11274.7
DATE 2,177 2.0% 491 22.6% 5 183.5 2027.0
LANGUAGE 5,329 4.9% 1,462 27.4% 25 384.3 2617.2
UNIQUE ID 174 0.2% 54 31.0% 1 1.0 0.3
ADDED 1,160 1.1% 525 45.3% 4 15.6 31.0
PUB TYPE 2,728 2.5% 666 24.4% 25 193.3 855.6
AUTHOR AFFIL. 565 0.5% 224 39.6% 9 119.0 832.6
CHEMICAL NAME 29 0.0% 6 20.7% 1,281 1061.0 490.2
EXACT CHEMICAL 3 0.0% 2 66.7% 116 116.0 0.0
AT 3,368 3.1% 1,011 30.0% 15 492.4 2626.6
AGE 229 0.2% 74 32.3% 16 111.9 372.9
ISN 4 0.0% 4 100% 0 0.0 0.0
ARTICLE 88 0.1% 20 22.7% 44 490.4 1339.8
XXS 160 0.1% 58 36.2% 22 613.7 4826.1
XMXS 108 0.1% 30 27.8% 17 54.8 130.1
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 36 0.0% 27 75.0% 36 1590.6 2421.9
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 21,653 28.1% 7,195 33.2% 6 219.2 1871.8
Single 55,403 71.9% 17,720 32.0% 16 1235.5 9902.7
PRESENT commands, by type:
MARC 28.7%
OPAC 29.5%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS