MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 02/17/01 through 02/23/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 51,889 2,768,665
MED90 10,560 182,977
MED85 8,035 66,352
MED80 7,126 33,791
MED75 6,739 20,937
MED66 6,941 28,891
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 2,511 50,206
2-4 a.m. 753 13,996
4-6 a.m. 331 15,939
6-8 a.m. 995 29,176
8-10 a.m. 5,717 231,363
10-12 a.m. 14,879 484,770
12-2 p.m. 15,407 565,088
2-4 p.m. 18,699 575,179
4-6 p.m. 15,740 546,849
6-8 p.m. 7,297 238,767
8-10 p.m. 5,160 210,850
10-12 p.m. 3,801 139,430
__________ _____________ _________________
Total: 91,290 3,101,613
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 330
Davis 825
Irvine 164
Los Angeles 572
Riverside 49
San Diego 595
San Francisco 1,064
Santa Barbara 62
Santa Cruz 7
Lawrence Berkeley 36
Lawrence Livermore 28
Los Alamos 0
MELWEB 74,614
Searchlight 12,344
Other - UC 14
Other-Network UC 586
_____
91,290
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 2,035
Davis 10,323
Irvine 1,607
Los Angeles 8,115
Riverside 440
San Diego 5,473
San Francisco 11,102
Santa Barbara 550
Santa Cruz 42
Lawrence Berkeley 163
Lawrence Livermore 877
Los Alamos 0
MELWEB 3,054,264
Searchlight 3
Other - UC 1,070
Other-Network UC 5,549
_____
3,101,613
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 3.4
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.8
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:06
Average session length (minutes:seconds) 18:24
Longest session recorded (minutes:seconds) 282:24
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 419.8
Retrievals per search - standard deviation 5195.9
Percent of searches completed with 0 results 34.2%
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 91,290 13.7%
PRESENT 533,509 80.3%
INIT or CLOSE 38,071 5.7%
OTHER 1,550 0.2%
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 5,654 4.3% 2,292 40.5% 4 1004.1 5886.5
PERSONAL AUTHOR 24,601 18.7% 7,281 29.6% 8 84.5 736.8
TITLE WORD 9,712 7.4% 3,774 38.9% 3 121.3 926.7
SUBSET 318 0.2% 86 27.0% 27 102.7 344.1
SUBJECT WORD 129 0.1% 63 48.8% 21 885.4 3603.7
SUBJECT 2,502 1.9% 1,381 55.2% 22 713.8 4182.0
EXACT SUBJECT 6,364 4.8% 1,768 27.8% 27 476.5 3017.2
MAJOR SUBJECT 149 0.1% 84 56.4% 27 334.0 1457.9
EXACT MAJOR SUBJ 544 0.4% 140 25.7% 33 227.8 675.5
EXACT TITLE 950 0.7% 677 71.3% 1 4.9 27.6
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,142 0.9% 355 31.1% 361 1582.5 2990.2
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 10 0.0% 6 60.0% 278 220.0 126.8
KEYWORD 56,880 43.2% 19,742 34.7% 19 815.2 7820.6
DATE 1,663 1.3% 490 29.5% 9 161.1 964.2
LANGUAGE 8,550 6.5% 2,587 30.3% 24 340.9 2883.6
UNIQUE ID 259 0.2% 22 8.5% 1 1.0 0.1
ADDED 1,083 0.8% 1,083 100% 0 0.0 0.0
PUB TYPE 3,858 2.9% 1,005 26.0% 23 158.8 607.2
AUTHOR AFFIL. 718 0.5% 340 47.4% 10 99.5 798.5
CHEMICAL NAME 14 0.0% 10 71.4% 13 630.3 1242.5
EXACT CHEMICAL 0 0.0% 0 0.0% 0 0.0 0.0
AT 5,777 4.4% 2,048 35.4% 22 771.6 7366.0
AGE 278 0.2% 58 20.9% 16 114.1 519.6
ISN 4 0.0% 4 100% 0 0.0 0.0
ARTICLE 176 0.1% 33 18.8% 35 709.3 4160.0
XXS 131 0.1% 72 55.0% 52 2041.4 11032.5
XMXS 44 0.0% 36 81.8% 9 9.5 4.9
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 43 0.0% 39 90.7% 66 2256.8 4425.8
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 26,152 28.6% 9,510 36.4% 9 330.3 4038.5
Single 65,138 71.4% 21,741 33.4% 18 756.3 7091.9
PRESENT commands, by type:
MARC 30.0%
OPAC 28.5%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS